git.el: Check for existing buffers on revert.

diff --git a/config.c b/config.c
index 0b0c9bd050023e15d3f49623ea036894cb5c521a..498259ebefb3ba61a75aa5a5ca03d75576a501c0 100644 (file)
--- a/config.c
+++ b/config.c
@@ -484,10 +484,9 @@ const char *git_etc_gitconfig(void)
                system_wide = ETC_GITCONFIG;
                if (!is_absolute_path(system_wide)) {
                        /* interpret path relative to exec-dir */
-                       const char *exec_path = git_exec_path();
-                       system_wide = strdup(prefix_filename(exec_path,
-                                                            strlen(exec_path),
-                                                            system_wide));
+                       struct strbuf d = STRBUF_INIT;
+                       strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
+                       system_wide = strbuf_detach(&d, NULL);
                }
        }
        return system_wide;