fix loadTexture to use locateResource()

src/Engine.cc

@@ -1348,7 +1348,8 @@ bool Engine::loadWFObjFile(const char *fname, WFObj::Buffer & buff)
 
 GLuint Engine::loadTexture(const char *fname)
 {
-    return m_textureCache.load(fname);
+    string path = locateResource(fname);
+    return m_textureCache.load(path.c_str());
 }
 
 /******** Engine::PickedObject functions ********/