cppcheck: multiCondition

2 "else if" with same condition, one of them is wrong and it seems here the first one.
More details here: http://nabble.documentfoundation.org/Cppcheck-reports-else-if-condition-matches-previous-condition-vcl-td4104270.html

Change-Id: I818cfa879a41c5818c429acc1645b1ee1f8b5103

vcl/source/gdi/impimage.cxx

@@ -297,7 +297,7 @@ void ImplImageBmp::Draw( sal_uInt16 nPos, OutputDevice* pOutDev,
                 {
                     if( aTmpBmpEx.IsAlpha() )
                         aTmpBmpEx = BitmapEx( aTmpBmp, aTmpBmpEx.GetAlpha() );
-                    else if( aTmpBmpEx.IsAlpha() )
+                    else if( aTmpBmpEx.IsTransparent() )
                         aTmpBmpEx = BitmapEx( aTmpBmp, aTmpBmpEx.GetMask() );
                 }