Use xmalloc instead of malloc

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/builtin-repo-config.c b/builtin-repo-config.c
index 6560cf1..a1756c8 100644
--- a/builtin-repo-config.c
+++ b/builtin-repo-config.c
@@ -84,7 +84,7 @@
 		*tl = tolower(*tl);
 
 	if (use_key_regexp) {
-		key_regexp = (regex_t*)malloc(sizeof(regex_t));
+		key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 		if (regcomp(key_regexp, key, REG_EXTENDED)) {
 			fprintf(stderr, "Invalid key pattern: %s\n", key_);
 			goto free_strings;
@@ -97,7 +97,7 @@
 			regex_++;
 		}
 
-		regexp = (regex_t*)malloc(sizeof(regex_t));
+		regexp = (regex_t*)xmalloc(sizeof(regex_t));
 		if (regcomp(regexp, regex_, REG_EXTENDED)) {
 			fprintf(stderr, "Invalid pattern: %s\n", regex_);
 			goto free_strings;