make use of optionalData on THREE.error.

src/renderers/webgl/WebGLProgram.js

@@ -334,17 +334,20 @@ THREE.WebGLProgram = ( function () {
 
 		_gl.linkProgram( program );
 
+		var programLogInfo = _gl.getProgramInfoLog( program );
+
 		if ( _gl.getProgramParameter( program, _gl.LINK_STATUS ) === false ) {
 
-			THREE.error( 'THREE.WebGLProgram: Could not initialise shader.' );
-			THREE.error( 'gl.VALIDATE_STATUS', _gl.getProgramParameter( program, _gl.VALIDATE_STATUS ) );
-			THREE.error( 'gl.getError()', _gl.getError() );
+			THREE.error( 'THREE.WebGLProgram: shader error: ' + _gl.getError(), {
+				'gl.VALIDATE_STATUS': _gl.getProgramParameter( program, _gl.VALIDATE_STATUS ),
+				'gl.getPRogramInfoLog': programLogInfo
+			});
 
 		}
+		
+		if ( programLogInfo !== '' ) {
 
-		if ( _gl.getProgramInfoLog( program ) !== '' ) {
-
-			THREE.warning( 'THREE.WebGLProgram: gl.getProgramInfoLog()', _gl.getProgramInfoLog( program ) );
+			THREE.warning( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLogInfo );
 			// THREE.warning( _gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glVertexShader ) );
 			// THREE.warning( _gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glFragmentShader ) );