Fix missing glyph handling in modified stb_truetype.h
Fix missing glyph handling in modified stb_truetype.h

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