add--interactive: allow custom diff highlighting programs

diff --git a/alias.c b/alias.c
index 6aa164a362427ffa5dc8616bcb01aec3f15b462b..3b90397a99d9f7ed4a0c1c5a83f5e69c879e752f 100644 (file)
--- a/alias.c
+++ b/alias.c
@@ -5,7 +5,8 @@ char *alias_lookup(const char *alias)
        char *v = NULL;
        struct strbuf key = STRBUF_INIT;
        strbuf_addf(&key, "alias.%s", alias);
-       git_config_get_string(key.buf, &v);
+       if (git_config_key_is_valid(key.buf))
+               git_config_get_string(key.buf, &v);
        strbuf_release(&key);
        return v;
 }
@@ -22,7 +23,7 @@ int split_cmdline(char *cmdline, const char ***argv)
        int src, dst, count = 0, size = 16;
        char quoted = 0;
 
-       *argv = xmalloc(sizeof(**argv) * size);
+       ALLOC_ARRAY(*argv, size);
 
        /* split alias_string */
        (*argv)[count++] = cmdline;