patch 8.2.2751: Coverity warns for using NULL pointer

Problem:    Coverity warns for using NULL pointer.
Solution:   Check for NULL in calling function.
diff --git a/src/userfunc.c b/src/userfunc.c
index 5221126..54335d4 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -973,8 +973,7 @@
 	garray_T    *default_args,
 	char_u	    *ret_type)
 {
-    int		evaluate = evalarg != NULL
-				      && (evalarg->eval_flags & EVAL_EVALUATE);
+    int		evaluate = (evalarg->eval_flags & EVAL_EVALUATE);
     ufunc_T	*ufunc = NULL;
     exarg_T	eap;
     garray_T	newlines;
@@ -1180,6 +1179,9 @@
     // Recognize "{" as the start of a function body.
     if (equal_arrow && **arg == '{')
     {
+	if (evalarg == NULL)
+	    // cannot happen?
+	    goto theend;
 	if (lambda_function_body(arg, rettv, evalarg, pnewargs,
 			   types_optional ? &argtypes : NULL, varargs,
 			   &default_args, ret_type) == FAIL)
diff --git a/src/version.c b/src/version.c
index ed22375..2e0d313 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2751,
+/**/
     2750,
 /**/
     2749,