Remove unused variables to fix some warnings

- Found on OS X.

Core/Contents/Source/PolyGLSLShader.cpp

@@ -196,7 +196,6 @@ void GLSLShader::linkProgram() {
 		char name[128];
 		glGetActiveUniform(shader_id, GLuint(i), sizeof(name)-1, &name_len, &num, &type, name );
 		name[name_len] = 0;
-		GLuint location = glGetUniformLocation( shader_id, name );
 		
 		if(!(String(name).find("gl_") == 0)) {
 		switch(type) {

Core/Contents/Source/PolyGLSLShaderModule.cpp

@@ -132,7 +132,7 @@ Shader *GLSLShaderModule::createShader(String name, String vpName, String fpName
 }
 
 Shader *GLSLShaderModule::createShader(TiXmlNode *node) {
-	TiXmlNode* pChild, *pChild2, *pChild3;	
+	TiXmlNode* pChild;
 	GLSLProgram *vp = NULL;
 	GLSLProgram *fp = NULL;
 	GLSLShader *retShader = NULL;