user32: Add missing calls to GlobalUnlock in render_synthesized_dib.

dlls/user32/clipboard.c

@@ -283,7 +283,8 @@ static HANDLE render_synthesized_dib( HANDLE data, UINT format, UINT from )
         header_size = (format == CF_DIBV5) ? sizeof(BITMAPV5HEADER) :
             offsetof( BITMAPINFO, bmiColors[src->bmiHeader.biCompression == BI_BITFIELDS ? 3 : 0] );
 
-        if (!(ret = GlobalAlloc( GMEM_FIXED, header_size + bits_size ))) goto done;
+        if ((ret = GlobalAlloc( GMEM_FIXED, header_size + bits_size )))
+        {
             bmi = (BITMAPINFO *)ret;
             memset( bmi, 0, header_size );
             memcpy( bmi, src, min( header_size, src_size ));
@@ -291,6 +292,8 @@ static HANDLE render_synthesized_dib( HANDLE data, UINT format, UINT from )
             /* FIXME: convert colors according to DIBv5 color profile */
             memcpy( (char *)bmi + header_size, (char *)src + src_size, bits_size );
         }
+        GlobalUnlock( data );
+    }
 
 done:
     ReleaseDC( 0, hdc );