Qt Service/Windows: Fix compilation with Qt 5 / QTSERVICE_DEBUG.

Fix oversight of last commit.

Change-Id: Iec9963313edf9d7438a90f9f3a7a4c6ae5065132
Task-number: QTSOLBUG-184
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

Author: Friedemann Kleint

qtservice/src/qtservice_win.cpp

@@ -418,7 +418,11 @@ bool QtServiceController::sendCommand(int code)
 }
 
 #if defined(QTSERVICE_DEBUG)
+#  if QT_VERSION >= 0x050000
+extern void qtServiceLogDebug(QtMsgType type, const QMessageLogContext &context, const QString &msg);
+#  else
 extern void qtServiceLogDebug(QtMsgType type, const char* msg);
+#  endif
 #endif
 
 void QtServiceBase::logMessage(const QString &message, MessageType type,
@@ -433,8 +437,11 @@ void QtServiceBase::logMessage(const QString &message, MessageType type,
     case Information: //fall through
     default: dbgMsg += "Information] "; break;
     }
-    dbgMsg += message.toAscii();
-    qtServiceLogDebug((QtMsgType)-1, dbgMsg.constData());
+#  if QT_VERSION >= 0x050000
+    qtServiceLogDebug((QtMsgType)-1, QMessageLogContext(), QLatin1String(dbgMsg) + message);
+#  else
+    qtServiceLogDebug((QtMsgType)-1, (dbgMsg + message.toAscii()).constData());
+#  endif
 #endif
 
     Q_D(QtServiceBase);