patch 8.2.1656: Vim9: callstack wrong if :def function calls :def function

Problem:    Vim9: callstack wrong if :def function calls :def function.
Solution:   Set the line number before calling. (closes #6914)
diff --git a/src/version.c b/src/version.c
index 2628ed6..7aa35c2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1656,
+/**/
     1655,
 /**/
     1654,