patch 8.2.2380: Vim9: occasional crash when using try/catch and a timer

Problem:    Vim9: occasional crash when using try/catch and a timer.
Solution:   Save and restore "need_rethrow" when invoking a timer callback.
            (closes #7708)
diff --git a/src/time.c b/src/time.c
index d1cf21b..c5ab693 100644
--- a/src/time.c
+++ b/src/time.c
@@ -478,6 +478,7 @@
 	    int save_must_redraw = must_redraw;
 	    int save_trylevel = trylevel;
 	    int save_did_throw = did_throw;
+	    int save_need_rethrow = need_rethrow;
 	    int save_ex_pressedreturn = get_pressedreturn();
 	    int save_may_garbage_collect = may_garbage_collect;
 	    except_T *save_current_exception = current_exception;
@@ -493,6 +494,7 @@
 	    must_redraw = 0;
 	    trylevel = 0;
 	    did_throw = FALSE;
+	    need_rethrow = FALSE;
 	    current_exception = NULL;
 	    may_garbage_collect = FALSE;
 	    save_vimvars(&vvsave);
@@ -513,6 +515,7 @@
 	    called_emsg = save_called_emsg;
 	    trylevel = save_trylevel;
 	    did_throw = save_did_throw;
+	    need_rethrow = save_need_rethrow;
 	    current_exception = save_current_exception;
 	    restore_vimvars(&vvsave);
 	    if (must_redraw != 0)
diff --git a/src/version.c b/src/version.c
index 2e67f32..0e4a97b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2380,
+/**/
     2379,
 /**/
     2378,