VS-Build: Disable /W4 parameter, as it is not picked up anyway
VS-Build: Disable /W4 parameter, as it is not picked up anyway

My other PR revealed, that the /W4 parameter, we give to MSVC is ignored
because cmake set CMAKE_C_FLAGS already to /W3 and we overwrite it.

The command line tools gave me a D9025 warning for this on every file and
looking into the project properties page on MSVC 2008 tells, that it has
the warning level set to /W3.

However, the warnings introduced by /W4 are far to useless for having
them enabled. So just disable them.

t0xicCode/libgit2,magnus98/TEST,stewid/libgit2,amyvmiwei/libgit2,maxiaoqian/libgit2,jeffhostetler/public_libgit2,mingyaaaa/libgit2,KTXSoftware/libgit2,whoisj/libgit2,leoyanggit/libgit2,mhp/libgit2,spraints/libgit2,skabel/manguse,mhp/libgit2,joshtriplett/libgit2,skabel/manguse,ardumont/libgit2,MrHacky/libgit2,JIghtuse/libgit2,amyvmiwei/libgit2,chiayolin/libgit2,since2014/libgit2,jeffhostetler/public_libgit2,swisspol/DEMO-libgit2,Corillian/libgit2,Corillian/libgit2,dleehr/libgit2,raybrad/libit2,MrHacky/libgit2,yongthecoder/libgit2,kenprice/libgit2,stewid/libgit2,zodiac/libgit2.js,kenprice/libgit2,linquize/libgit2,leoyanggit/libgit2,yosefhackmon/libgit2,dleehr/libgit2,raybrad/libit2,falqas/libgit2,jflesch/libgit2-mariadb,kenprice/libgit2,spraints/libgit2,mrksrm/Mingijura,dleehr/libgit2,claudelee/libgit2,nokiddin/libgit2,t0xicCode/libgit2,oaastest/libgit2,claudelee/libgit2,chiayolin/libgit2,since2014/libgit2,maxiaoqian/libgit2,sygool/libgit2,spraints/libgit2,sim0629/libgit2,amyvmiwei/libgit2,joshtriplett/libgit2,sygool/libgit2,joshtriplett/libgit2,Corillian/libgit2,mcanthony/libgit2,mrksrm/Mingijura,jamieleecool/ptest,chiayolin/libgit2,raybrad/libit2,mcanthony/libgit2,raybrad/libit2,joshtriplett/libgit2,jflesch/libgit2-mariadb,yosefhackmon/libgit2,kissthink/libgit2,nacho/libgit2,joshtriplett/libgit2,yongthecoder/libgit2,sygool/libgit2,yongthecoder/libgit2,mingyaaaa/libgit2,ardumont/libgit2,swisspol/DEMO-libgit2,kissthink/libgit2,stewid/libgit2,Snazz2001/libgit2,zodiac/libgit2.js,evhan/libgit2,oaastest/libgit2,saurabhsuniljain/libgit2,ardumont/libgit2,swisspol/DEMO-libgit2,iankronquist/libgit2,nokiddin/libgit2,iankronquist/libgit2,t0xicCode/libgit2,oaastest/libgit2,spraints/libgit2,rcorre/libgit2,jflesch/libgit2-mariadb,iankronquist/libgit2,mingyaaaa/libgit2,mrksrm/Mingijura,zodiac/libgit2.js,nacho/libgit2,whoisj/libgit2,evhan/libgit2,saurabhsuniljain/libgit2,swisspol/DEMO-libgit2,jflesch/libgit2-mariadb,skabel/manguse,zodiac/libgit2.js,oaastest/libgit2,linquize/libgit2,iankronquist/libgit2,mcanthony/libgit2,spraints/libgit2,evhan/libgit2,Tousiph/Demo1,JIghtuse/libgit2,zodiac/libgit2.js,magnus98/TEST,chiayolin/libgit2,falqas/libgit2,MrHacky/libgit2,nokiddin/libgit2,sim0629/libgit2,Corillian/libgit2,kenprice/libgit2,t0xicCode/libgit2,amyvmiwei/libgit2,whoisj/libgit2,claudelee/libgit2,maxiaoqian/libgit2,mcanthony/libgit2,claudelee/libgit2,yosefhackmon/libgit2,linquize/libgit2,chiayolin/libgit2,saurabhsuniljain/libgit2,jeffhostetler/public_libgit2,oaastest/libgit2,sygool/libgit2,since2014/libgit2,kenprice/libgit2,mhp/libgit2,leoyanggit/libgit2,Tousiph/Demo1,kissthink/libgit2,KTXSoftware/libgit2,dleehr/libgit2,iankronquist/libgit2,Snazz2001/libgit2,mhp/libgit2,chiayolin/libgit2,magnus98/TEST,leoyanggit/libgit2,Aorjoa/libgit2_maked_lib,sim0629/libgit2,yongthecoder/libgit2,linquize/libgit2,jamieleecool/ptest,amyvmiwei/libgit2,claudelee/libgit2,sim0629/libgit2,raybrad/libit2,maxiaoqian/libgit2,mingyaaaa/libgit2,MrHacky/libgit2,jeffhostetler/public_libgit2,ardumont/libgit2,skabel/manguse,whoisj/libgit2,ardumont/libgit2,leoyanggit/libgit2,KTXSoftware/libgit2,evhan/libgit2,oaastest/libgit2,mcanthony/libgit2,nacho/libgit2,yosefhackmon/libgit2,dleehr/libgit2,Aorjoa/libgit2_maked_lib,Tousiph/Demo1,iankronquist/libgit2,saurabhsuniljain/libgit2,MrHacky/libgit2,yosefhackmon/libgit2,since2014/libgit2,whoisj/libgit2,yongthecoder/libgit2,JIghtuse/libgit2,dleehr/libgit2,saurabhsuniljain/libgit2,nokiddin/libgit2,saurabhsuniljain/libgit2,amyvmiwei/libgit2,Snazz2001/libgit2,falqas/libgit2,stewid/libgit2,nokiddin/libgit2,jeffhostetler/public_libgit2,ardumont/libgit2,JIghtuse/libgit2,mrksrm/Mingijura,kissthink/libgit2,mingyaaaa/libgit2,mrksrm/Mingijura,Snazz2001/libgit2,Tousiph/Demo1,yosefhackmon/libgit2,maxiaoqian/libgit2,kissthink/libgit2,Aorjoa/libgit2_maked_lib,Tousiph/Demo1,magnus98/TEST,jamieleecool/ptest,swisspol/DEMO-libgit2,rcorre/libgit2,Aorjoa/libgit2_maked_lib,sygool/libgit2,joshtriplett/libgit2,maxiaoqian/libgit2,rcorre/libgit2,stewid/libgit2,spraints/libgit2,KTXSoftware/libgit2,t0xicCode/libgit2,skabel/manguse,skabel/manguse,yongthecoder/libgit2,leoyanggit/libgit2,jamieleecool/ptest,rcorre/libgit2,kissthink/libgit2,stewid/libgit2,sim0629/libgit2,Snazz2001/libgit2,rcorre/libgit2,jflesch/libgit2-mariadb,JIghtuse/libgit2,falqas/libgit2,sygool/libgit2,whoisj/libgit2,nacho/libgit2,linquize/libgit2,magnus98/TEST,sim0629/libgit2,mhp/libgit2,KTXSoftware/libgit2,MrHacky/libgit2,since2014/libgit2,Tousiph/Demo1,jeffhostetler/public_libgit2,KTXSoftware/libgit2,falqas/libgit2,mingyaaaa/libgit2,Corillian/libgit2,swisspol/DEMO-libgit2,Corillian/libgit2,Snazz2001/libgit2,since2014/libgit2,claudelee/libgit2,mrksrm/Mingijura,kenprice/libgit2,JIghtuse/libgit2,t0xicCode/libgit2,nokiddin/libgit2,Aorjoa/libgit2_maked_lib,mcanthony/libgit2,linquize/libgit2,jflesch/libgit2-mariadb,rcorre/libgit2,magnus98/TEST,mhp/libgit2,falqas/libgit2