Add mutable OAHashMap::lookup_ptr function to fix mutability.
Add mutable OAHashMap::lookup_ptr function to fix mutability.

pkowal1982/godot,josempans/godot,ZuBsPaCe/godot,sanikoyes/godot,Valentactive/godot,josempans/godot,Valentactive/godot,pkowal1982/godot,josempans/godot,godotengine/godot,BastiaanOlij/godot,BastiaanOlij/godot,akien-mga/godot,ZuBsPaCe/godot,sanikoyes/godot,sanikoyes/godot,josempans/godot,firefly2442/godot,Shockblast/godot,Shockblast/godot,Shockblast/godot,josempans/godot,akien-mga/godot,Zylann/godot,Valentactive/godot,sanikoyes/godot,pkowal1982/godot,akien-mga/godot,ZuBsPaCe/godot,Zylann/godot,guilhermefelipecgs/godot,Shockblast/godot,godotengine/godot,godotengine/godot,pkowal1982/godot,ZuBsPaCe/godot,Valentactive/godot,ZuBsPaCe/godot,akien-mga/godot,sanikoyes/godot,Zylann/godot,guilhermefelipecgs/godot,godotengine/godot,pkowal1982/godot,vkbsb/godot,godotengine/godot,Shockblast/godot,Valentactive/godot,josempans/godot,josempans/godot,josempans/godot,firefly2442/godot,vkbsb/godot,godotengine/godot,guilhermefelipecgs/godot,firefly2442/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,pkowal1982/godot,Zylann/godot,godotengine/godot,BastiaanOlij/godot,Valentactive/godot,akien-mga/godot,godotengine/godot,firefly2442/godot,guilhermefelipecgs/godot,akien-mga/godot,vkbsb/godot,BastiaanOlij/godot,vkbsb/godot,firefly2442/godot,Shockblast/godot,ZuBsPaCe/godot,akien-mga/godot,Shockblast/godot,firefly2442/godot,pkowal1982/godot,sanikoyes/godot,BastiaanOlij/godot,guilhermefelipecgs/godot,vkbsb/godot,Zylann/godot,ZuBsPaCe/godot,BastiaanOlij/godot,Zylann/godot,Shockblast/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,vkbsb/godot,firefly2442/godot,sanikoyes/godot,ZuBsPaCe/godot,Valentactive/godot,Zylann/godot,Valentactive/godot,pkowal1982/godot,Zylann/godot,akien-mga/godot,firefly2442/godot,vkbsb/godot,vkbsb/godot,sanikoyes/godot,BastiaanOlij/godot