check_http: Fix whitespace issues

In check_http.c, tabs aren't used for indentation.

plugins/check_http.c

@@ -284,18 +284,18 @@ process_arguments (int argc, char **argv)
     case 'C': /* Check SSL cert validity */
 #ifdef HAVE_SSL
       if ((temp=strchr(optarg,','))!=NULL) {
-	*temp='\0';
-	if (!is_intnonneg (temp))
-	  usage2 (_("Invalid certificate expiration period"), optarg);
-	days_till_exp_warn = atoi(optarg);
-	*temp=',';
-	temp++;
-	if (!is_intnonneg (temp))
-	  usage2 (_("Invalid certificate expiration period"), temp);
-	days_till_exp_crit = atoi (temp);
+        *temp='\0';
+        if (!is_intnonneg (temp))
+          usage2 (_("Invalid certificate expiration period"), optarg);
+        days_till_exp_warn = atoi(optarg);
+        *temp=',';
+        temp++;
+        if (!is_intnonneg (temp))
+          usage2 (_("Invalid certificate expiration period"), temp);
+        days_till_exp_crit = atoi (temp);
       }
       else {
-	days_till_exp_crit=0;
+        days_till_exp_crit=0;
         if (!is_intnonneg (optarg))
           usage2 (_("Invalid certificate expiration period"), optarg);
         days_till_exp_warn = atoi (optarg);