Fix stupid crash on fallback glyph handling (ttf branch)
Fix stupid crash on fallback glyph handling (ttf branch)

tpoechtrager/imgui,mikesart/imgui,benoitjacquier/imgui,redblobgames/imgui,rmoorman/imgui,wflohry/imgui-addons,ocornut/imgui,rxantos/imgui,luiseduardohdbackup/imgui,neshume/imgui,thennequin/imgui,kylawl/imgui,xunmengfeng/imgui,tpoechtrager/imgui,emoon/imgui,tom-seddon/imgui,luiseduardohdbackup/imgui,GHF/imgui,nProtect/imgui,redblobgames/imgui,neshume/imgui,bkaradzic/imgui,benoitjacquier/imgui,ghassanpl/imgui,thevaber/imgui,wangshijin/imgui,cmaughan/imgui,emoon/imgui,andresv/imgui,bkaradzic/imgui,dougbinks/imgui,Pagghiu/imgui,mikesart/imgui,Extrawurst/imgui,twigletguy/imgui,DXsmiley/FlexGUI,zho7611/imgui,wflohry/imgui-addons,cmaughan/imgui,Pagghiu/imgui,ggtucker/imgui,gyakoo/imgui,seanmiddleditch/imgui,wasikuss/imgui,bagobor/imgui,ocornut/imgui,seanmiddleditch/imgui,twigletguy/imgui,Flix01/imgui,Flix01/imgui,andresv/imgui,tom-seddon/imgui,Flix01/imgui,usagi/imguixx,bkaradzic/imgui,ggtucker/imgui,zho7611/imgui,gyakoo/imgui,ghassanpl/imgui,Extrawurst/imgui,shaggytwodope/imgui,gamedeff/imgui,rxantos/imgui,sakishum/imgui,nmlgc/imgui,nProtect/imgui,gamedeff/imgui,xythobuz/imgui,rmoorman/imgui,elect86/imgui,xunmengfeng/imgui,usagi/imguixx,cmaughan/imgui,aimotive/imgui-glfw,wangshijin/imgui,burningreggae/imgui,Psybrus/imgui,aimotive/imgui-glfw,nmlgc/imgui,xythobuz/imgui,bagobor/imgui,elect86/imgui,GHF/imgui,cmaughan/imgui,DXsmiley/FlexGUI,sakishum/imgui,wasikuss/imgui,kylawl/imgui,burningreggae/imgui,thevaber/imgui,dougbinks/imgui,ggtucker/imgui,thennequin/imgui,ocornut/imgui,nProtect/imgui,Psybrus/imgui,shaggytwodope/imgui