fix dynamic font crash if no available font size
fix dynamic font crash if no available font size

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