fix bug in local_strcat()

diff --git a/src/metaflac/utils.c b/src/metaflac/utils.c
index 07edba2..3d57f9b 100644 (file)
--- a/src/metaflac/utils.c
+++ b/src/metaflac/utils.c
@@ -50,13 +50,13 @@ void local_strcat(char **dest, const char *source)
        ndest = *dest? strlen(*dest) : 0;
        nsource = strlen(source);
 
-       *dest = realloc(*dest, ndest + nsource);
+       if(nsource == 0)
+               return;
+
+       *dest = realloc(*dest, ndest + nsource + 1);
        if(0 == *dest)
                die("out of memory growing string");
-       if(0 == ndest)
-               strcpy(*dest, source);
-       else
-               strcat(*dest, source);
+       strcpy((*dest)+ndest, source);
 }
 
 void hexdump(const char *filename, const FLAC__byte *buf, unsigned bytes, const char *indent)