Add "-nt" option to only show todos.

src/dorem.c

@@ -1213,6 +1213,10 @@ int TriggerReminder(ParsePtr p, Trigger *t, TimeTrig const *tim, int dse, int is
     char const *msg_command = NULL;
     Value v;
 
+    if (OnlyTodos && !(t->is_todo)) {
+        return OK;
+    }
+    
     if (MsgCommand) {
         msg_command = MsgCommand;
     }

src/globals.h

@@ -72,6 +72,7 @@ EXTERN  INIT(   int     CalMonths, 0);
 EXTERN  INIT(   char const *CalType, "none");
 EXTERN  INIT(   int     Hush, 0);
 EXTERN  INIT(   int     NextMode, 0);
+EXTERN  INIT(   int     OnlyTodos, 0);
 EXTERN  INIT(   int     InfiniteDelta, 0);
 EXTERN  INIT(   int     DefaultTDelta, 0);
 EXTERN  INIT(   int     DefaultDelta, NO_DELTA);

src/init.c

@@ -336,6 +336,10 @@ void InitRemind(int argc, char const *argv[])
                 DontQueue = 1;
                 Daemon = 0;
                 IgnoreOnce = 1;
+                if (*arg == 't') {
+                    OnlyTodos = 1;
+                    arg++;
+                }
                 break;
 
             case 'r':