MDEV-12755 Replication tests fail in buildbot with ASAN

remove double-initialization of MYSQL structure

client/mysql.cc

@@ -1145,8 +1145,6 @@ int main(int argc,char *argv[])
   outfile[0]=0;			// no (default) outfile
   strmov(pager, "stdout");	// the default, if --pager wasn't given
 
-  mysql_init(&mysql);
-
   {
     char *tmp=getenv("PAGER");
     if (tmp && strlen(tmp))
@@ -1185,7 +1183,11 @@ int main(int argc,char *argv[])
   }
   defaults_argv=argv;
   if ((status.exit_status= get_options(argc, (char **) argv)))
-    mysql_end(-1);
+  {
+    free_defaults(defaults_argv);
+    my_end(0);
+    exit(status.exit_status);
+  }
 
   if (status.batch && !status.line_buff &&
       !(status.line_buff= batch_readline_init(MAX_BATCH_BUFFER_SIZE, stdin)))