WebGLUniforms: Fix setValueV1i().

src/renderers/webgl/WebGLUniforms.js

@@ -421,11 +421,11 @@ function setValueV1i( gl, v ) {
 
 	var cache = this.cache;
 
-	if ( arraysEqual( cache, v ) ) return;
+	if ( cache[ 0 ] === v ) return;
 
-	gl.uniform1iv( this.addr, v );
+	gl.uniform1i( this.addr, v );
 
-	copyArray( cache, v );
+	cache[ 0 ] = v;
 
 }