mergetool--lib: improve show_tool_help() output

diff --git a/argv-array.c b/argv-array.c
index 0b5f8898a10f16df8a6273f8960f05b670ba94bc..256741d2262b237c56b6730bea9d52c9b39b7ee3 100644 (file)
--- a/argv-array.c
+++ b/argv-array.c
@@ -49,12 +49,21 @@ void argv_array_pushl(struct argv_array *array, ...)
        va_end(ap);
 }
 
+void argv_array_pop(struct argv_array *array)
+{
+       if (!array->argc)
+               return;
+       free((char *)array->argv[array->argc - 1]);
+       array->argv[array->argc - 1] = NULL;
+       array->argc--;
+}
+
 void argv_array_clear(struct argv_array *array)
 {
        if (array->argv != empty_argv) {
                int i;
                for (i = 0; i < array->argc; i++)
-                       free((char **)array->argv[i]);
+                       free((char *)array->argv[i]);
                free(array->argv);
        }
        argv_array_init(array);