Bug correction in the logic for loading an Ascii model

src/modelFile/modelFile.cpp

@@ -133,13 +133,15 @@ SimpleModel* loadModelSTL(SimpleModel *m,const char* filename, FMatrix3x3& matri
         SimpleModel* asciiModel = loadModelSTL_ascii(m, filename, matrix);
         if (!asciiModel)
             return nullptr;
-        else
-            return asciiModel;
+
+        // This logic is used to handle the case where the file starts with
+        // "solid" but is a binary file.
         if (m->volumes[m->volumes.size()-1].faces.size() < 1)
         {
             m->volumes.erase(m->volumes.end() - 1);
             return loadModelSTL_binary(m, filename, matrix);
         }
+        return asciiModel;
     }
     return loadModelSTL_binary(m, filename, matrix);
 }