moved initGlew call before the glWidget init call so we can use OpenGL

calls during initialization of the Widget, or at least avoid a segfault
when calling opengl functions in makeCurrent

OpenFlipper.cc

@@ -571,14 +571,14 @@ int main(int argc, char **argv)
         }
       }
      }
-    
-    // After setting all Options from command line, build the real gui
-    w->init();
 
     #ifndef __APPLE__
     initGlew();
     #endif
- 
+
+    // After setting all Options from command line, build the real gui
+    w->init();
+
     const QStringList positionalArguments = parser.positionalArguments();
 
     for ( auto file: positionalArguments ) {