No bug

r=mkaply, sr=blizzard
OS/2 only - code from jblanco to get print preview working

gfx/src/os2/nsDeviceContextOS2.cpp

@@ -846,7 +846,7 @@ NS_IMETHODIMP nsDeviceContextOS2 :: GetDeviceContextFor(nsIDeviceContextSpec *aD
   HDC dc = PrnOpenDC(pq, "Mozilla", numCopies, toPrinter, file);
 
   if (!dc) {
-     PMERROR("DevOpenDC");
+     return NS_ERROR_FAILURE; //PMERROR("DevOpenDC");
   } /* endif */
 
   return ((nsDeviceContextOS2 *)aContext)->Init((nsNativeDeviceContext)dc, this);

gfx/src/os2/nsDeviceContextSpecOS2.cpp

@@ -624,6 +624,9 @@ HDC PrnOpenDC( PRTQUEUE *pInfo, PSZ pszApplicationName, int copies, int toPrinte
    LONG dcType;
    DEVOPENSTRUC dop;
 
+   if (!pInfo || !pszApplicationName)
+      return hdc;
+
    char pszQueueProcParams[CCHMAXPATH] = "COP=";
    char numCopies[12];
    itoa (copies, numCopies, 10);