t6042: Add failing testcases for rename/rename/add-{source,dest} conflicts

diff --git a/builtin/grep.c b/builtin/grep.c
index 891e5eab3da4d835325e859bf8979664e2c112ae..10a1f65310f28f2014bab3f3295205abf6dc59ad 100644 (file)
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -414,10 +414,10 @@ static void *load_file(const char *filename, size_t *sz)
        err_ret:
                if (errno != ENOENT)
                        error(_("'%s': %s"), filename, strerror(errno));
-               return 0;
+               return NULL;
        }
        if (!S_ISREG(st.st_mode))
-               return 0;
+               return NULL;
        *sz = xsize_t(st.st_size);
        i = open(filename, O_RDONLY);
        if (i < 0)
@@ -427,7 +427,7 @@ static void *load_file(const char *filename, size_t *sz)
                error(_("'%s': short read %s"), filename, strerror(errno));
                close(i);
                free(data);
-               return 0;
+               return NULL;
        }
        close(i);
        data[*sz] = 0;