Fixes crash when shader inputs/outputs is invalid string
Fixes crash when shader inputs/outputs is invalid string

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