patch 9.0.1746: vim9class compile error for char/char_u conversion

Problem: vim9class compile error for char/char_u conversion
Solution: Correctly cast to (char *)

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 05e7e03..8f0db98 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1746,
+/**/
     1745,
 /**/
     1744,
diff --git a/src/vim9class.c b/src/vim9class.c
index 3822753..10b178e 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -802,7 +802,7 @@
 			    continue;
 
 			// Ensure the type is matching.
-			where.wt_func_name = m->ocm_name;
+			where.wt_func_name = (char *)m->ocm_name;
 			where.wt_kind = WT_MEMBER;
 			if (check_type_maybe(if_ms[if_i].ocm_type, m->ocm_type, TRUE,
 				    where) != OK)