patch 9.1.1579: Coverity complains about unchecked return value

Problem:  Coverity complains about unchecked return value in
          common_function() (after v9.1.1577)
Solution: Check the return value of skip_generic_func_type_args()
          and return in case of an error (Yegappan Lakshmanan)

closes: #17818

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: yegappan

src/evalfunc.c

@@ -5219,7 +5219,8 @@ common_function(typval_T *argvars, typval_T *rettv, int is_funcref)
 	{
 	    // generic function
 	    start_bracket = name;
-	    skip_generic_func_type_args(&name);
+	    if (skip_generic_func_type_args(&name) == FAIL)
+		goto theend;
 	}
 	if (*name != NUL)
 	    s = NULL;

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1579,
 /**/
     1578,
 /**/