rename READ_SHA1_FILE_REPLACE flag to LOOKUP_REPLACE_OBJECT

The READ_SHA1_FILE_REPLACE flag is more related to using the
lookup_replace_object() function rather than the
read_sha1_file() function.

We also need such a flag to be used with sha1_object_info()
instead of read_sha1_file().

The name LOOKUP_REPLACE_OBJECT is therefore better for this
flag.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

cache.h

@@ -760,11 +760,11 @@ int daemon_avoid_alias(const char *path);
 int offset_1st_component(const char *path);
 
 /* object replacement */
-#define READ_SHA1_FILE_REPLACE 1
+#define LOOKUP_REPLACE_OBJECT 1
 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 {
-	return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
+	return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
 }
 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)

sha1_file.c

@@ -2662,7 +2662,7 @@ void *read_sha1_file_extended(const unsigned char *sha1,
 	void *data;
 	char *path;
 	const struct packed_git *p;
-	const unsigned char *repl = (flag & READ_SHA1_FILE_REPLACE)
+	const unsigned char *repl = (flag & LOOKUP_REPLACE_OBJECT)
 		? lookup_replace_object(sha1) : sha1;
 
 	errno = 0;