fix heif load fails with 0 length metadata

fixes #1901
2020-12-07 14:29:10 -08:00 · 2020-12-07 14:29:10 -08:00 · daf2df7bb5
commit daf2df7bb5
parent 5f3482bff5
1 changed files with 2 additions and 0 deletions
--- a/libvips/foreign/heifload.c
+++ b/libvips/foreign/heifload.c
@ -468,6 +468,8 @@ vips_foreign_load_heif_set_header( VipsForeignLoadHeif *heif, VipsImage *out )
 		printf( "metadata type = %s, length = %zu\n", type, length ); 
 #endif /*DEBUG*/

+		if( !length )
+			continue;
 		if( !(data = VIPS_ARRAY( out, length, unsigned char )) )
 			return( -1 );
 		error = heif_image_handle_get_metadata(