Fix compilation on Qt5 < 5.5

Author: nyalldawson

src/app/main.cpp

@@ -399,7 +399,7 @@ void myMessageOutput( QtMsgType type, const char *msg )
     }
 
 
-#if QT_VERSION >= 0x050000
+#if QT_VERSION >= 0x050500
     case QtInfoMsg:
       myPrint( "Info: %s\n", msg );
       break;