patch 9.0.2173: Vim9: crash when compiling for statement and non-existing type

Problem:  Vim9: Vim crashes when compiling a for statement with a
          non-existing type
Solution: Error out when  lhs_type is not null

closes: #13703

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 213a0e7..779e116 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2173,
+/**/
     2172,
 /**/
     2170,