Macros: Check and reset currentMacro pointer after deletion

Task-number: QTCREATORBUG-16933
Change-Id: Ib55d5dd4b0478b655d6cb31f28c8ceb38159912f
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/macros/macromanager.cpp

@@ -183,6 +183,8 @@ void MacroManager::MacroManagerPrivate::removeMacro(const QString &name)
 
     // Remove macro from the map
     Macro *macro = macros.take(name);
+    if (macro == currentMacro)
+        currentMacro = 0;
     delete macro;
 }