filebuf.c: fix unused-but-set warning
filebuf.c: fix unused-but-set warning

write_deflate() used to ignore errors by zlib's deflate function when
not compiling in DEBUG mode. Always read $result and throw an error
instead.

Signed-off-by: schu <90bd52136ce4791fcc41c69bf9bb6c7db1f385bd@schulog.org>

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