Fixes division by zero when 3d body does not have valid shape
Fixes division by zero when 3d body does not have valid shape

Fixes #46738 by setting the default inertia to a valid value when there are no valid shapes for a 3d body.
Changed the comment style for the update_inertias method as well.

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