do some cleanup in Framebuffer::completeness
do some cleanup in Framebuffer::completeness

Trac #20875
Signed-off-by: Nicolas Capens

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@1112 736b8ea6-26fd-11df-bfd4-992fa37f6226

pombreda/angleproject,domokit/waterfall,MSOpenTech/angle,crezefire/angle,csa7mdm/angle,ppy/angle,android-ia/platform_external_chromium_org_third_party_angle,ghostoy/angle,crezefire/angle,MSOpenTech/angle-win8.0,ppy/angle,cantren/angleproject,xuxiandi/angleproject,mybios/angle,themusicgod1/angleproject,MSOpenTech/angle,xuxiandi/angleproject,MSOpenTech/angle-win8.0,stammen/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,KTXSoftware/angleproject,shairai/angleproject,mikolalysenko/angle,ecoal95/angle,pombreda/angleproject,cvsuser-chromium/chromium-third-party_angle_dx11,RepublicMaster/angleproject,MSOpenTech/angle,vvuk/angle-old,mlfarrell/angle,ecoal95/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,ghostoy/angle,MIPS/external-chromium_org-third_party-angle_dx11,xin3liang/platform_external_chromium_org_third_party_angle,nandhanurrevanth/angle,stammen/angleproject,geekboxzone/lollipop_external_chromium_org_third_party_angle,stammen/angleproject,MSOpenTech/angle,domokit/waterfall,pombreda/angleproject,mlfarrell/angle,MIPS/external-chromium_org-third_party-angle,larsbergstrom/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,cvsuser-chromium/chromium-third-party_angle_dx11,themusicgod1/angleproject,MSOpenTech/angle-win8.0,ecoal95/angle,mybios/angle,vvuk/angle,csa7mdm/angle,android-ia/platform_external_chromium_org_third_party_angle,KalebDark/angleproject,nandhanurrevanth/angle,vvuk/angle-old,bsergean/angle,jgcaaprom/android_external_chromium_org_third_party_angle,crezefire/angle,larsbergstrom/angle,larsbergstrom/angle,mrobinson/rust-angle,MIPS/external-chromium_org-third_party-angle,ecoal95/angle,shairai/angleproject,mrobinson/rust-angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle_dx11,android-ia/platform_external_chromium_org_third_party_angle,xuxiandi/angleproject,MIPS/external-chromium_org-third_party-angle,ghostoy/angle,xin3liang/platform_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,shairai/angleproject,MSOpenTech/angle-win8.0,mlfarrell/angle,KalebDark/angleproject,nandhanurrevanth/angle,cantren/angleproject,ehsan/angle,mybios/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,KalebDark/angleproject,bsergean/angle,KTXSoftware/angleproject,RepublicMaster/angleproject,ppy/angle,cantren/angleproject,pombreda/angleproject,MIPS/external-chromium_org-third_party-angle_dx11,mrobinson/rust-angle,ghostoy/angle,nandhanurrevanth/angle,ehsan/angle,crezefire/angle,mybios/angle,mikolalysenko/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,themusicgod1/angleproject,ppy/angle,mrobinson/rust-angle,RepublicMaster/angleproject,RepublicMaster/angleproject,ehsan/angle,KTXSoftware/angleproject,vvuk/angle-old,vvuk/angle,xin3liang/platform_external_chromium_org_third_party_angle,csa7mdm/angle,mlfarrell/angle,KTXSoftware/angleproject,themusicgod1/angleproject,xuxiandi/angleproject,android-ia/platform_external_chromium_org_third_party_angle,shairai/angleproject,xin3liang/platform_external_chromium_org_third_party_angle,mrobinson/rust-angle,stammen/angleproject,mikolalysenko/angle,jgcaaprom/android_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,cvsuser-chromium/chromium-third-party_angle_dx11,csa7mdm/angle,KalebDark/angleproject,vvuk/angle-old,cantren/angleproject,bsergean/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,ecoal95/angle,KTXSoftware/angleproject,mikolalysenko/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,larsbergstrom/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle_dx11,android-ia/platform_external_chromium_org_third_party_angle_dx11,bsergean/angle,vvuk/angle,cvsuser-chromium/chromium-third-party_angle_dx11,vvuk/angle,ehsan/angle