Fixed a bug that allowed reading to an integer format from a non-integer frame buffer.
Fixed a bug that allowed reading to an integer format from a non-integer frame buffer.

TRAC #23276

Signed-off-by: Nicolas Capens
Signed-off-by: Shannon Woods
Author: Geoff Lang

larsbergstrom/angle,xin3liang/platform_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,crezefire/angle,MIPS/external-chromium_org-third_party-angle,mlfarrell/angle,MSOpenTech/angle,MSOpenTech/angle,nandhanurrevanth/angle,jgcaaprom/android_external_chromium_org_third_party_angle,csa7mdm/angle,csa7mdm/angle,ppy/angle,larsbergstrom/angle,bsergean/angle,mikolalysenko/angle,crezefire/angle,larsbergstrom/angle,android-ia/platform_external_chromium_org_third_party_angle,nandhanurrevanth/angle,mikolalysenko/angle,ecoal95/angle,vvuk/angle,ecoal95/angle,MIPS/external-chromium_org-third_party-angle,bsergean/angle,mybios/angle,ecoal95/angle,ghostoy/angle,crezefire/angle,mlfarrell/angle,ppy/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,crezefire/angle,nandhanurrevanth/angle,android-ia/platform_external_chromium_org_third_party_angle,vvuk/angle,nandhanurrevanth/angle,domokit/waterfall,domokit/waterfall,mrobinson/rust-angle,xin3liang/platform_external_chromium_org_third_party_angle,ecoal95/angle,xin3liang/platform_external_chromium_org_third_party_angle,ppy/angle,csa7mdm/angle,mybios/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,MSOpenTech/angle,mikolalysenko/angle,mybios/angle,vvuk/angle,mrobinson/rust-angle,ghostoy/angle,vvuk/angle,jgcaaprom/android_external_chromium_org_third_party_angle,ppy/angle,android-ia/platform_external_chromium_org_third_party_angle,bsergean/angle,mikolalysenko/angle,mrobinson/rust-angle,MSOpenTech/angle,jgcaaprom/android_external_chromium_org_third_party_angle,mlfarrell/angle,ghostoy/angle,xin3liang/platform_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,ghostoy/angle,csa7mdm/angle,mrobinson/rust-angle,mybios/angle,ecoal95/angle,MIPS/external-chromium_org-third_party-angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,mrobinson/rust-angle,android-ia/platform_external_chromium_org_third_party_angle,bsergean/angle,larsbergstrom/angle,mlfarrell/angle