gestures: fix: allow gesture to be triggered

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 5e6b6558c6e72b9c743d961fba0dae0707768392)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/control/gestures.c

@@ -419,6 +419,11 @@ static int MovedEvent( vlc_object_t *p_this, char const *psz_var,
                 p_sys->i_pattern |= pattern << ( p_sys->i_num_gestures * 4 );
                 p_sys->i_num_gestures++;
             }
+            else if( p_sys->i_num_gestures == 0 )
+            {
+                p_sys->i_pattern = pattern;
+                p_sys->i_num_gestures++;
+            }
         }
 
     }