input: don't be too clever with start-time - fixes #3042

Deeper code can cope with too overly large values.
We need to accept seemingly too far start times because the length is
typically not known at startup (and hence set to zero).
(cherry picked from commit 3629d607)

src/input/input.c

@@ -957,12 +957,6 @@ static void StartTitle( input_thread_t * p_input )
 
     const mtime_t i_length = var_GetTime( p_input, "length" );
     if( p_input->p->i_start > 0 )
-    {
-        if( p_input->p->i_start >= i_length )
-        {
-            msg_Warn( p_input, "invalid start-time ignored" );
-        }
-        else
     {
         vlc_value_t s;
 
@@ -972,7 +966,6 @@ static void StartTitle( input_thread_t * p_input )
         s.i_time = p_input->p->i_start;
         input_ControlPush( p_input, INPUT_CONTROL_SET_TIME, &s );
     }
-    }
     if( p_input->p->i_stop > 0 && p_input->p->i_stop <= p_input->p->i_start )
     {
         msg_Warn( p_input, "invalid stop-time ignored" );