patch 9.0.1163: compiler warning for implicit size_t/int conversion

Problem:    Compiler warning for implicit size_t/int conversion.
Solution:   Add a type cast. (Mike Williams, closes #11795)
diff --git a/src/version.c b/src/version.c
index ab9c91c..4fbd96d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1163,
+/**/
     1162,
 /**/
     1161,
diff --git a/src/vim9type.c b/src/vim9type.c
index 62d4363..ba925e0 100644
--- a/src/vim9type.c
+++ b/src/vim9type.c
@@ -1275,7 +1275,7 @@
     // It can be a class or interface name.
     typval_T tv;
     tv.v_type = VAR_UNKNOWN;
-    if (eval_variable(*arg, len, 0, &tv, NULL, EVAL_VAR_IMPORT) == OK)
+    if (eval_variable(*arg, (int)len, 0, &tv, NULL, EVAL_VAR_IMPORT) == OK)
     {
 	if (tv.v_type == VAR_CLASS && tv.vval.v_class != NULL)
 	{