patch 8.1.0082: in terminal window, typing : at more prompt, inserts ':'

Problem:    In terminal window, typing : at more prompt, inserts ':' instead
            of starting another Ex command.
Solution:   Add skip_term_loop and set it when putting ':' in the typeahead
            buffer.
diff --git a/src/globals.h b/src/globals.h
index 22199c9..db3a73f 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -371,6 +371,11 @@
 #  endif
 # endif
 #endif
+#ifdef FEAT_TERMINAL
+		// When TRUE skip calling terminal_loop() once.  Used when
+		// typing ':' at the more prompt.
+EXTERN int	skip_term_loop INIT(= FALSE);
+#endif
 #ifdef FEAT_GUI
 EXTERN char_u	*use_gvimrc INIT(= NULL);	/* "-U" cmdline argument */
 #endif