patch 8.0.0155: ubsan complains about NULL pointer

Problem:    When sorting zero elements a NULL pointer is passed to qsort(),
            which ubsan warns for.
Solution:   Don't call qsort() if there are no elements. (Dominique Pelle)

src/syntax.c

@@ -6704,7 +6704,9 @@ syntime_report(void)
 	}
     }
 
-    /* sort on total time */
+    /* Sort on total time. Skip if there are no items to avoid passing NULL
+     * pointer to qsort(). */
+    if (ga.ga_len > 1)
 	qsort(ga.ga_data, (size_t)ga.ga_len, sizeof(time_entry_T),
 							 syn_compare_syntime);
 

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    155,
 /**/
     154,
 /**/