patch 8.1.2195: Vim does not exit when the terminal window is last window

Problem:    Vim does not exit when closing a terminal window and it is the
            last window.
Solution:   Exit Vim if the closed terminal window is the last one.
            (closes #4539)
diff --git a/src/terminal.c b/src/terminal.c
index 7b2d43b..07b2e97 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -3073,6 +3073,16 @@
 	    aco_save_T	aco;
 	    int		do_set_w_closing = term->tl_buffer->b_nwindows == 0;
 
+	    // If this is the last normal window: exit Vim.
+	    if (term->tl_buffer->b_nwindows > 0 && only_one_window())
+	    {
+		exarg_T ea;
+
+		vim_memset(&ea, 0, sizeof(ea));
+		ex_quit(&ea);
+		return TRUE;
+	    }
+
 	    // ++close or term_finish == "close"
 	    ch_log(NULL, "terminal job finished, closing window");
 	    aucmd_prepbuf(&aco, term->tl_buffer);