[PATCH] mailinfo: use strcmp() for string comparison

["René Scharfe" <l.s.r@web.de>]

The array header is defined as:

	static const char *header[MAX_HDR_PARSED] = {
	     "From","Subject","Date",
	};

When looking for the index of a specfic string in that array, simply
use strcmp() instead of memcmp().  This avoids running over the end of
the string (e.g. with memcmp("Subject", "From", 7)) and gets rid of
magic string length constants.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
---
This is a minimal fix.  A good question, however, would be: Why do we
keep on looking up constant strings in a (short) constant string array
anyway?

 builtin/mailinfo.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index 2c3cd8e..cf11c8d 100644
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -334,7 +334,7 @@ static int check_header(const struct strbuf *line,
 	}
 	if (starts_with(line->buf, "[PATCH]") && isspace(line->buf[7])) {
 		for (i = 0; header[i]; i++) {
-			if (!memcmp("Subject", header[i], 7)) {
+			if (!strcmp("Subject", header[i])) {
 				handle_header(&hdr_data[i], line);
 				ret = 1;
 				goto check_header_out;
@@ -929,13 +929,13 @@ static void handle_info(void)
 		else
 			continue;
 
-		if (!memcmp(header[i], "Subject", 7)) {
+		if (!strcmp(header[i], "Subject")) {
 			if (!keep_subject) {
 				cleanup_subject(hdr);
 				cleanup_space(hdr);
 			}
 			output_header_lines(fout, "Subject", hdr);
-		} else if (!memcmp(header[i], "From", 4)) {
+		} else if (!strcmp(header[i], "From")) {
 			cleanup_space(hdr);
 			handle_from(hdr);
 			fprintf(fout, "Author: %s\n", name.buf);
-- 
2.0.0