patch 8.2.0544: memory leak in search test

Problem:    Memory leak in search test.
Solution:   Free msgbuf. (Dominique Pelle, closes #5912)

src/search.c

@@ -1416,6 +1416,7 @@ do_search(
 		// Reserve enough space for the search pattern + offset.
 		len = STRLEN(p) + off_len + 3;
 
+	    vim_free(msgbuf);
 	    msgbuf = alloc(len);
 	    if (msgbuf != NULL)
 	    {

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    544,
 /**/
     543,
 /**/