[libpng16] Imported from libpng-1.6.30rc02.tar

pngrutil.c

@@ -2540,6 +2540,7 @@ png_handle_zTXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
    /* Note, "length" is sufficient here; we won't be adding
     * a null terminator later.
     */
+
    buffer = png_read_buffer(png_ptr, length, 2/*silent*/);
 
    if (buffer == NULL)