* src/sfnt/pngshim.c (Load_SBit_Png): Fix memory leak (#59322).

The issue is that `rows` is allocated but will not be freed in the
event that the call to `png_read_image` fails and calls `longjmp`.

ChangeLog

@@ -1,3 +1,10 @@
+2020-10-23  Ben Wagner  <bungeman@google.com>
+
+	* src/sfnt/pngshim.c (Load_SBit_Png): Fix memory leak (#59322).
+
+	The issue is that `rows` is allocated but will not be freed in the
+	event that the call to `png_read_image` fails and calls `longjmp`.
+
 2020-10-20  Werner Lemberg  <wl@gnu.org>
 
 	* Version 2.10.4 released.

src/sfnt/pngshim.c

@@ -443,6 +443,7 @@
     png_read_end( png, info );
 
   DestroyExit:
+    FT_FREE( rows );
     png_destroy_read_struct( &png, &info, NULL );
     FT_Stream_Close( &stream );