git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index 07a0c2316bec4dd8341ea494b02874a1b12483cd..019abd3527e7c573c69900a58313749e2ef2280a 100644 (file)
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@ -266,7 +266,7 @@ static void show_one_commit(struct commit *commit, int no_name)
        strbuf_init(&pretty, 0);
        if (commit->object.parsed) {
                pretty_print_commit(CMIT_FMT_ONELINE, commit,
-                                       &pretty, 0, NULL, NULL, 0);
+                                   &pretty, 0, NULL, NULL, 0, 0);
                pretty_str = pretty.buf;
        }
        if (!prefixcmp(pretty_str, "[PATCH] "))
@@ -536,6 +536,8 @@ static void append_one_rev(const char *av)
 static int git_show_branch_config(const char *var, const char *value)
 {
        if (!strcmp(var, "showbranch.default")) {
+               if (!value)
+                       return config_error_nonbool(var);
                if (default_alloc <= default_num + 1) {
                        default_alloc = default_alloc * 3 / 2 + 20;
                        default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);