Default cv_vidwait to Off.

Turn off V-Sync for ticrates != 60

src/sdl/i_video.c

@@ -98,7 +98,7 @@ rendermode_t rendermode=render_soft;
 boolean highcolor = false;
 
 // synchronize page flipping with screen refresh
-consvar_t cv_vidwait = {"vid_wait", "On", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
+consvar_t cv_vidwait = {"vid_wait", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
 static consvar_t cv_stretch = {"stretch", "Off", CV_SAVE|CV_NOSHOWHELP, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
 
 UINT8 graphics_started = 0; // Is used in console.c and screen.c