[PATCH 09/11] diffcore-pickaxe: "share" regex error handling code

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

There's another regcomp code block coming in this function. By moving
the error handling code out of this block, we don't have to add the
same error handling code in the new block.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 diffcore-pickaxe.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index 7715c13..69c6567 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -204,20 +204,13 @@ void diffcore_pickaxe(struct diff_options *o)
 	int opts = o->pickaxe_opts;
 	regex_t regex, *regexp = NULL;
 	kwset_t kws = NULL;
+	int err = 0;
 
 	if (opts & (DIFF_PICKAXE_REGEX | DIFF_PICKAXE_KIND_G)) {
-		int err;
 		int cflags = REG_EXTENDED | REG_NEWLINE;
 		if (DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE))
 			cflags |= REG_ICASE;
 		err = regcomp(&regex, needle, cflags);
-		if (err) {
-			/* The POSIX.2 people are surely sick */
-			char errbuf[1024];
-			regerror(err, &regex, errbuf, 1024);
-			regfree(&regex);
-			die("invalid regex: %s", errbuf);
-		}
 		regexp = &regex;
 	} else {
 		kws = kwsalloc(DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE)
@@ -225,6 +218,13 @@ void diffcore_pickaxe(struct diff_options *o)
 		kwsincr(kws, needle, strlen(needle));
 		kwsprep(kws);
 	}
+	if (err) {
+		/* The POSIX.2 people are surely sick */
+		char errbuf[1024];
+		regerror(err, &regex, errbuf, 1024);
+		regfree(&regex);
+		die("invalid regex: %s", errbuf);
+	}
 
 	/* Might want to warn when both S and G are on; I don't care... */
 	pickaxe(&diff_queued_diff, o, regexp, kws,
-- 
2.8.2.526.g02eed6d