ImplClear sets mbSwapOut false, so mbSwapOut is actually always false here

i.e. failure to swap in does not mean that mbSwapOut is true afterwards, and
mpSwapFile is discarded. It means the whole thing is thrown away.

Change-Id: I73704866d77078c73d053047a7d2ef6499a3e69d

vcl/source/gdi/impgraph.cxx

@@ -1267,10 +1267,12 @@ bool ImpGraphic::ImplSwapIn( SvStream* xIStm )
             bRet = ImplReadEmbedded( *xIStm );
             mbSwapUnderway = false;
 
-            if( !bRet )
+            if (!bRet)
+            {
+                //throw away swapfile, etc.
                 ImplClear();
-            else
-                mbSwapOut = false;
+            }
+            mbSwapOut = false;
         }
     }