Fixes crash when using Theme::clear
Fixes crash when using Theme::clear

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