CONTAINER_APPEND is SAL_ULONG, an unsigned long

Fix WaE: implicit conversion from 'unsigned long' to 'sal_uInt32' (aka
'unsigned int') changes value from 18446744073709551615 to 4294967295,
which definitely sounds like an actual bug-inducing error to me, not
"just a warning".

So don't try to use it as default value for a parameter of type
sal_uInt32. Changing the parameter to sal_uLong.

Change-Id: I8ebc7195ba1bf94f4f2d6df7cd7863f779ba3fa6

svx/source/svdraw/svdfmtf.cxx

@@ -201,7 +201,7 @@ void ImpSdrGDIMetaFileImport::DoLoopActions(GDIMetaFile& rMtf, SvdProgressInfo*
 sal_uInt32 ImpSdrGDIMetaFileImport::DoImport(
     const GDIMetaFile& rMtf,
     SdrObjList& rOL,
-    sal_uInt32 nInsPos,
+    sal_uLong nInsPos,
     SvdProgressInfo* pProgrInfo)
 {
     // setup some global scale parameter

svx/source/svdraw/svdfmtf.hxx

@@ -162,7 +162,7 @@ public:
     sal_uInt32 DoImport(
         const GDIMetaFile& rMtf,
         SdrObjList& rDestList,
-        sal_uInt32 nInsPos = CONTAINER_APPEND,
+        sal_uLong nInsPos = CONTAINER_APPEND,
         SvdProgressInfo* pProgrInfo = 0);
 };