BUG/MINOR: stats admin: "Unexpected result" was displayed unconditionally

I introduced a regression in commit 19979e176e while reworking the admin
actions results.
"Unexpected result" was displayed even if the action was applied due to a
misplaced initialization. This small patch should fix it.

Note: no need to backport.

diff --git a/src/proto_http.c b/src/proto_http.c
index 3db7de1..39a1fd6 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -7150,13 +7150,13 @@
 		if (memcmp(h, ";st=", 4) == 0) {
 			int i;
 			h += 4;
+			si->applet.ctx.stats.st_code = STAT_STATUS_UNKN;
 			for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
 				if (strncmp(stat_status_codes[i], h, 4) == 0) {
 					si->applet.ctx.stats.st_code = i;
 					break;
 				}
 			}
-			si->applet.ctx.stats.st_code = STAT_STATUS_UNKN;
 			break;
 		}
 		h++;