Fixing WebGL + Android instancing.

examples/05-instancing/vs_instancing.sc

@@ -10,13 +10,9 @@ $output v_color0
 
 void main()
 {
-	mat4 model;
-	model[0] = i_data0;
-	model[1] = i_data1;
-	model[2] = i_data2;
-	model[3] = i_data3;
+	mat4 model = mtxFromCols(i_data0, i_data1, i_data2, i_data3);
 
-	vec4 worldPos = instMul(model, vec4(a_position, 1.0) );
+	vec4 worldPos = mul(model, vec4(a_position, 1.0) );
 	gl_Position = mul(u_viewProj, worldPos);
 	v_color0 = a_color0*i_data4;
 }