tests: make GIT_TEST_FAIL_PREREQS a boolean

diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index ebe48f60c159bf61ae1dcf66448db861f0060519..cb9ea793675c850fb4bf9ab87a8e1b62f1695b02 100644 (file)
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -1,3 +1,4 @@
+#define USE_THE_INDEX_COMPATIBILITY_MACROS
 #include "cache.h"
 #include "config.h"
 #include "diff.h"
@@ -169,7 +170,7 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
 
                if (opt->diffopt.detect_rename) {
                        if (!the_index.cache)
-                               read_index(&the_index);
+                               repo_read_index(the_repository);
                        opt->diffopt.setup |= DIFF_SETUP_USE_SIZE_CACHE;
                }
                while (fgets(line, sizeof(line), stdin)) {