Fix clearcoat without Schlick-GGX specular.
Fix clearcoat without Schlick-GGX specular.

Fixes #11698.

n-pigeon/godot,n-pigeon/godot,NateWardawg/godot,Shockblast/godot,RandomShaper/godot,sanikoyes/godot,Brickcaster/godot,pkowal1982/godot,DmitriySalnikov/godot,mcanders/godot,firefly2442/godot,Zylann/godot,zicklag/godot,ZuBsPaCe/godot,Paulloz/godot,zicklag/godot,pkowal1982/godot,vkbsb/godot,guilhermefelipecgs/godot,Valentactive/godot,groud/godot,okamstudio/godot,mcanders/godot,ageazrael/godot,vkbsb/godot,Valentactive/godot,guilhermefelipecgs/godot,n-pigeon/godot,Paulloz/godot,BastiaanOlij/godot,Faless/godot,Faless/godot,BastiaanOlij/godot,akien-mga/godot,NateWardawg/godot,vkbsb/godot,Zylann/godot,NateWardawg/godot,Paulloz/godot,Brickcaster/godot,DmitriySalnikov/godot,FateAce/godot,ex/godot,Brickcaster/godot,godotengine/godot,MarianoGnu/godot,zicklag/godot,Brickcaster/godot,ZuBsPaCe/godot,firefly2442/godot,akien-mga/godot,Shockblast/godot,Shockblast/godot,groud/godot,NateWardawg/godot,akien-mga/godot,okamstudio/godot,ageazrael/godot,guilhermefelipecgs/godot,Faless/godot,okamstudio/godot,Paulloz/godot,ageazrael/godot,godotengine/godot,Brickcaster/godot,vkbsb/godot,godotengine/godot,groud/godot,groud/godot,Paulloz/godot,RandomShaper/godot,akien-mga/godot,honix/godot,Shockblast/godot,ageazrael/godot,BastiaanOlij/godot,godotengine/godot,vnen/godot,vnen/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,pkowal1982/godot,zicklag/godot,groud/godot,BastiaanOlij/godot,DmitriySalnikov/godot,josempans/godot,MarianoGnu/godot,Faless/godot,honix/godot,josempans/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,okamstudio/godot,BastiaanOlij/godot,Valentactive/godot,Valentactive/godot,MarianoGnu/godot,ZuBsPaCe/godot,firefly2442/godot,honix/godot,josempans/godot,mcanders/godot,godotengine/godot,mcanders/godot,ex/godot,BastiaanOlij/godot,sanikoyes/godot,Zylann/godot,vkbsb/godot,ZuBsPaCe/godot,Paulloz/godot,honix/godot,josempans/godot,Brickcaster/godot,ZuBsPaCe/godot,vnen/godot,n-pigeon/godot,sanikoyes/godot,ex/godot,honix/godot,josempans/godot,okamstudio/godot,FateAce/godot,Valentactive/godot,akien-mga/godot,Shockblast/godot,FateAce/godot,firefly2442/godot,sanikoyes/godot,zicklag/godot,zicklag/godot,MarianoGnu/godot,firefly2442/godot,godotengine/godot,MarianoGnu/godot,FateAce/godot,pkowal1982/godot,vkbsb/godot,josempans/godot,MarianoGnu/godot,Valentactive/godot,Shockblast/godot,pkowal1982/godot,okamstudio/godot,mcanders/godot,MarianoGnu/godot,vnen/godot,sanikoyes/godot,guilhermefelipecgs/godot,okamstudio/godot,Zylann/godot,pkowal1982/godot,n-pigeon/godot,Zylann/godot,Valentactive/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,vnen/godot,ZuBsPaCe/godot,ex/godot,Paulloz/godot,sanikoyes/godot,FateAce/godot,firefly2442/godot,vnen/godot,DmitriySalnikov/godot,ex/godot,Valentactive/godot,NateWardawg/godot,Shockblast/godot,NateWardawg/godot,groud/godot,MarianoGnu/godot,akien-mga/godot,n-pigeon/godot,Faless/godot,godotengine/godot,okamstudio/godot,pkowal1982/godot,sanikoyes/godot,vkbsb/godot,BastiaanOlij/godot,ex/godot,firefly2442/godot,josempans/godot,guilhermefelipecgs/godot,vkbsb/godot,mcanders/godot,n-pigeon/godot,Brickcaster/godot,pkowal1982/godot,RandomShaper/godot,RandomShaper/godot,okamstudio/godot,firefly2442/godot,BastiaanOlij/godot,godotengine/godot,Zylann/godot,Shockblast/godot,honix/godot,DmitriySalnikov/godot,okamstudio/godot,sanikoyes/godot,ageazrael/godot,ageazrael/godot,RandomShaper/godot,NateWardawg/godot,ex/godot,Faless/godot,josempans/godot,DmitriySalnikov/godot,ageazrael/godot,FateAce/godot,akien-mga/godot,akien-mga/godot,Faless/godot,NateWardawg/godot,Zylann/godot,vnen/godot,NateWardawg/godot,RandomShaper/godot,Zylann/godot,Faless/godot,ex/godot,vnen/godot,RandomShaper/godot