patch 8.1.0362: cannot get the script line number when executing a function

Problem:    Cannot get the script line number when executing a function.
Solution:   Store the line number besides the script ID. (Ozaki Kiichi,
            closes #3362)  Also display the line number with ":verbose set".
diff --git a/src/globals.h b/src/globals.h
index 3446cba..3f5b61f 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -325,8 +325,8 @@
 EXTERN int	want_garbage_collect INIT(= FALSE);
 EXTERN int	garbage_collect_at_exit INIT(= FALSE);
 
-/* ID of script being sourced or was sourced to define the current function. */
-EXTERN scid_T	current_SID INIT(= 0);
+// Script CTX being sourced or was sourced to define the current function.
+EXTERN sctx_T	current_sctx INIT(= {0 COMMA 0});
 #endif
 
 EXTERN int	did_source_packages INIT(= FALSE);