QmakeProject: Fix crash

There's no target if the project is in the parsing without configuration
state.

Change-Id: Id21e2ded5b634253267e956accc27715e6562941
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/qmakeprojectmanager/qmakeproject.cpp

@@ -650,7 +650,8 @@ void QmakeProject::update()
     m_asyncUpdateState = Base;
     enableActiveQmakeBuildConfiguration(activeTarget(), true);
     updateBuildSystemData();
-    activeTarget()->updateDefaultDeployConfigurations();
+    if (activeTarget())
+        activeTarget()->updateDefaultDeployConfigurations();
     updateRunConfigurations();
     emit proFilesEvaluated();
 }