Android: Prevent crash if running on a terget without deployconfiguration

Should be impossible to do, but the stacktrace in the linked task shows
that it is possible somehow.

Task-number: QTCREATORBUG-12776
Change-Id: I1f2054bbaa132c29dfc4579fb7020f364bddd939
Reviewed-by: BogDan Vatra <bogdan@kde.org>

src/plugins/android/androidglobal.h

@@ -47,6 +47,8 @@ public:
 
     template<class T> static T *buildStep(const ProjectExplorer::DeployConfiguration *dc)
     {
+        if (!dc)
+            return 0;
         ProjectExplorer::BuildStepList *bsl = dc->stepList();
         if (!bsl)
             return 0;