make sure uniforms don't get loaded when they are not in the shader

src/renderers/WebGLRenderer.js

@@ -2132,7 +2132,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 				 material instanceof THREE.MeshPhongMaterial ||
 				 material.envMap ) {
 
-				if ( p_uniforms.cameraPosition !== null ) {
+				if ( p_uniforms.cameraPosition !== undefined ) {
 
 					_vector3.setFromMatrixPosition( camera.matrixWorld );
 					_gl.uniform3f( p_uniforms.cameraPosition, _vector3.x, _vector3.y, _vector3.z );
@@ -2147,10 +2147,9 @@ THREE.WebGLRenderer = function ( parameters ) {
 				 material instanceof THREE.ShaderMaterial ||
 				 material.skinning ) {
 
-				if ( p_uniforms.viewMatrix !== null ) {
+				if ( p_uniforms.viewMatrix !== undefined ) {
 
 					_gl.uniformMatrix4fv( p_uniforms.viewMatrix, false, camera.matrixWorldInverse.elements );
-
 				}
 
 			}
@@ -2163,13 +2162,13 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 		if ( material.skinning ) {
 
-			if ( object.bindMatrix && p_uniforms.bindMatrix !== null ) {
+			if ( object.bindMatrix && p_uniforms.bindMatrix !== undefined ) {
 
 				_gl.uniformMatrix4fv( p_uniforms.bindMatrix, false, object.bindMatrix.elements );
 
 			}
 
-			if ( object.bindMatrixInverse && p_uniforms.bindMatrixInverse !== null ) {
+			if ( object.bindMatrixInverse && p_uniforms.bindMatrixInverse !== undefined ) {
 
 				_gl.uniformMatrix4fv( p_uniforms.bindMatrixInverse, false, object.bindMatrixInverse.elements );
 
@@ -2177,7 +2176,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 			if ( _supportsBoneTextures && object.skeleton && object.skeleton.useVertexTexture ) {
 
-				if ( p_uniforms.boneTexture !== null ) {
+				if ( p_uniforms.boneTexture !== undefined ) {
 
 					var textureUnit = getTextureUnit();
 
@@ -2186,13 +2185,13 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 				}
 
-				if ( p_uniforms.boneTextureWidth !== null ) {
+				if ( p_uniforms.boneTextureWidth !== undefined ) {
 
 					_gl.uniform1i( p_uniforms.boneTextureWidth, object.skeleton.boneTextureWidth );
 
 				}
 
-				if ( p_uniforms.boneTextureHeight !== null ) {
+				if ( p_uniforms.boneTextureHeight !== undefined ) {
 
 					_gl.uniform1i( p_uniforms.boneTextureHeight, object.skeleton.boneTextureHeight );
 
@@ -2200,10 +2199,11 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 			} else if ( object.skeleton && object.skeleton.boneMatrices ) {
 
-				if ( p_uniforms.boneGlobalMatrices !== null ) {
+				if ( p_uniforms.boneGlobalMatrices !== undefined ) {
 
 					_gl.uniformMatrix4fv( p_uniforms.boneGlobalMatrices, false, object.skeleton.boneMatrices );
 
+
 				}
 
 			}
@@ -2301,10 +2301,10 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 		loadUniformsMatrices( p_uniforms, object );
 
-		if ( p_uniforms.modelMatrix !== null ) {
+		if ( p_uniforms.modelMatrix !== undefined ) {
 
 			_gl.uniformMatrix4fv( p_uniforms.modelMatrix, false, object.matrixWorld.elements );
-
+			
 		}
 
 		return program;