make sure the pasteboard paste location is only set once

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71913 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/carbon/dataobj.cpp

@@ -401,6 +401,7 @@ bool wxDataObject::GetFromPasteboard( void * pb )
     ItemCount itemCount = 0;
     wxString filenamesPassed;
     bool transferred = false;
+    bool pastelocationset = false;
 
     // we synchronize here once again, so we don't mind which flags get returned
     PasteboardSynchronize( pasteboard );
@@ -443,6 +444,8 @@ bool wxDataObject::GetFromPasteboard( void * pb )
                     if ( dataFormat == flavorFormat )
                     {
                         if ( UTTypeConformsTo( (CFStringRef)flavorType, kPasteboardTypeFileURLPromise) )
+                        {
+                            if ( !pastelocationset )
                             {
                                 wxString tempdir = wxFileName::GetTempDir() + wxFILE_SEP_PATH + "wxtemp.XXXXXX";
                                 char* result = mkdtemp((char*)tempdir.fn_str().data());
@@ -452,6 +455,8 @@ bool wxDataObject::GetFromPasteboard( void * pb )
                                 
                                 wxCFRef<CFURLRef> dest(CFURLCreateFromFileSystemRepresentation(NULL,(const UInt8*)result,strlen(result),true));
                                 PasteboardSetPasteLocation(pasteboard, dest);
+                                pastelocationset = true;
+                           }
                         }
                         else if ( flavorFormat.GetType() != wxDF_PRIVATE )
                         {