Fixes set_source_id not updating the next automatic source id
Fixes set_source_id not updating the next automatic source id

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