fixed crashes when the Q-Reg stack is non-empty at exit

* Test case: sciteco -e '[a'
  [aEX$$ in interactive mode would also crash.
* No longer use a destructor - it was executed after the Q-Reg view was
  destroyed.
* Instead, we now explicitly call teco_qreg_stack_clear() in main().
* Added a regression test case.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/qreg.h b/src/qreg.h
index 4797a01..6199b31 100644
--- a/src/qreg.h
+++ b/src/qreg.h
@@ -179,6 +179,7 @@ extern teco_qreg_table_t teco_qreg_table_globals;
 
 gboolean teco_qreg_stack_push(teco_qreg_t *qreg, GError **error);
 gboolean teco_qreg_stack_pop(teco_qreg_t *qreg, GError **error);
+void teco_qreg_stack_clear(void);
 
 typedef enum {
 	TECO_ED_HOOK_ADD = 1,