Fix crash (and bug) in RichTextLabel
Fix crash (and bug) in RichTextLabel

vkbsb/godot,akien-mga/godot,groud/godot,NateWardawg/godot,Shockblast/godot,DmitriySalnikov/godot,josempans/godot,godotengine/godot,firefly2442/godot,BastiaanOlij/godot,honix/godot,okamstudio/godot,ZuBsPaCe/godot,Valentactive/godot,vnen/godot,BastiaanOlij/godot,Faless/godot,NateWardawg/godot,Zylann/godot,godotengine/godot,ex/godot,MarianoGnu/godot,akien-mga/godot,vkbsb/godot,RandomShaper/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,groud/godot,okamstudio/godot,okamstudio/godot,okamstudio/godot,RandomShaper/godot,Zylann/godot,Shockblast/godot,Paulloz/godot,NateWardawg/godot,Faless/godot,Zylann/godot,firefly2442/godot,godotengine/godot,NateWardawg/godot,ex/godot,sanikoyes/godot,sanikoyes/godot,Paulloz/godot,MarianoGnu/godot,vkbsb/godot,Faless/godot,sanikoyes/godot,Zylann/godot,MarianoGnu/godot,MarianoGnu/godot,Valentactive/godot,BastiaanOlij/godot,RandomShaper/godot,pkowal1982/godot,RandomShaper/godot,RandomShaper/godot,Shockblast/godot,RandomShaper/godot,josempans/godot,vkbsb/godot,Paulloz/godot,firefly2442/godot,mcanders/godot,akien-mga/godot,akien-mga/godot,ZuBsPaCe/godot,NateWardawg/godot,josempans/godot,DmitriySalnikov/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,sanikoyes/godot,akien-mga/godot,DmitriySalnikov/godot,mcanders/godot,guilhermefelipecgs/godot,Valentactive/godot,firefly2442/godot,BastiaanOlij/godot,akien-mga/godot,josempans/godot,vkbsb/godot,ZuBsPaCe/godot,Paulloz/godot,Paulloz/godot,BastiaanOlij/godot,DmitriySalnikov/godot,josempans/godot,MarianoGnu/godot,Paulloz/godot,mcanders/godot,Zylann/godot,sanikoyes/godot,Valentactive/godot,NateWardawg/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,okamstudio/godot,vnen/godot,pkowal1982/godot,groud/godot,josempans/godot,okamstudio/godot,Faless/godot,Faless/godot,pkowal1982/godot,pkowal1982/godot,honix/godot,okamstudio/godot,Zylann/godot,RandomShaper/godot,pkowal1982/godot,Zylann/godot,ex/godot,groud/godot,godotengine/godot,godotengine/godot,mcanders/godot,vnen/godot,godotengine/godot,ex/godot,Shockblast/godot,ex/godot,ZuBsPaCe/godot,vkbsb/godot,ZuBsPaCe/godot,groud/godot,Valentactive/godot,ex/godot,ZuBsPaCe/godot,vnen/godot,firefly2442/godot,josempans/godot,DmitriySalnikov/godot,BastiaanOlij/godot,mcanders/godot,sanikoyes/godot,Shockblast/godot,honix/godot,okamstudio/godot,akien-mga/godot,NateWardawg/godot,Faless/godot,godotengine/godot,firefly2442/godot,Zylann/godot,ex/godot,honix/godot,sanikoyes/godot,vnen/godot,Faless/godot,BastiaanOlij/godot,vkbsb/godot,okamstudio/godot,vkbsb/godot,Paulloz/godot,Faless/godot,groud/godot,akien-mga/godot,Shockblast/godot,DmitriySalnikov/godot,Shockblast/godot,josempans/godot,MarianoGnu/godot,pkowal1982/godot,pkowal1982/godot,BastiaanOlij/godot,ex/godot,Valentactive/godot,honix/godot,honix/godot,pkowal1982/godot,firefly2442/godot,vnen/godot,vnen/godot,NateWardawg/godot,sanikoyes/godot,NateWardawg/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,mcanders/godot,ZuBsPaCe/godot,godotengine/godot,okamstudio/godot,vnen/godot,MarianoGnu/godot,firefly2442/godot,Shockblast/godot,guilhermefelipecgs/godot,MarianoGnu/godot,Valentactive/godot,Valentactive/godot