tdf#118690 don't try to process all messages

Regression from commit 221b0ab1 ("WIN use Reschedule instead
of own dispatch loops"). This limit the maximum reschedule loops
as the original code did. There is still a busy loop when opening
the print dialog, as it was before the patch, but this at least
gets printing started.

Change-Id: If867329b82b13c898bb15b08584244084488a66c
Reviewed-on: https://gerrit.libreoffice.org/60310
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

vcl/win/gdi/salprn.cxx

@@ -1287,6 +1287,7 @@ static BOOL CALLBACK SalPrintAbortProc( HDC hPrnDC, int /* nError */ )
 {
     SalData*    pSalData = GetSalData();
     WinSalPrinter* pPrinter;
+    int         i = 0;
     bool        bWhile = true;
 
     // Ensure we handle the mutex which will be released in WinSalInstance::DoYield
@@ -1295,6 +1296,10 @@ static BOOL CALLBACK SalPrintAbortProc( HDC hPrnDC, int /* nError */ )
     {
         // process messages
         bWhile = Application::Reschedule( true );
+        if (i > 15)
+            bWhile = false;
+        else
+            ++i;
 
         pPrinter = pSalData->mpFirstPrinter;
         while ( pPrinter )
@@ -1457,7 +1462,7 @@ bool WinSalPrinter::StartJob( const OUString* pFileName,
 
     // As the Telecom Balloon Fax driver tends to send messages repeatedly
     // we try to process first all, and then insert a dummy message
-    while ( Application::Reschedule( true ) );
+    for (int i = 0; Application::Reschedule( true ) && i <= 15; ++i);
     BOOL const ret = PostMessageW(GetSalData()->mpInstance->mhComWnd, SAL_MSG_DUMMY, 0, 0);
     SAL_WARN_IF(0 == ret, "vcl", "ERROR: PostMessage() failed!");