iOS, make sure SfxApplication::GetOrCreate() is called

For some reason SfxApplication::GetOrCreate() was never called, this leads
to problems when opening documents (reference to shared pointer).

Adding dummy call to SfxApplication::GetOrCreate() to make sure the list
contains at least one entry.

Change-Id: Ic8848c17efae5a0a38c9e9f7299a5f36f69aef31

desktop/source/lib/init.cxx

@@ -3593,6 +3593,7 @@ static int lo_initialize(LibreOfficeKit* pThis, const char* pAppPath, const char
             // there might be more elegant ways to get InitVCL() called, but
             // this one works :-)
             InitVCL();
+            SfxApplication::GetOrCreate();
 #endif
 
             if (eStage == PRE_INIT)