patch 8.2.4075: test failures

Problem:    Test failures.
Solution:   Change check for NULL pointer.

src/userfunc.c

@@ -4152,13 +4152,11 @@ define_function(exarg_T *eap, char_u *name_arg, garray_T *lines_to_free)
 	    else
 		eap->skip = TRUE;
 	}
-	if (name == NULL)
-	    goto ret_free;  // out of memory
 
 	// For "export def FuncName()" in an autoload script the function name
 	// is stored with the legacy autoload name "dir#script#FuncName" so
 	// that it can also be found in legacy script.
-	if (is_export)
+	if (is_export && name != NULL)
 	    name = may_prefix_autoload(name);
     }
 

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4075,
 /**/
     4074,
 /**/