Use aspect_fix() not aspect_correct() for initial window size

Caused the initial window to be the wrong size.

src/syncterm/syncterm.c

@@ -1472,7 +1472,7 @@ int main(int argc, char **argv)
 	vparams[cvmode].aspect_height = settings.custom_ah;
 	ciolib_initial_window_height = settings.window_height;
 	ciolib_initial_window_width = settings.window_width;
-	aspect_correct(&ciolib_initial_window_width, &ciolib_initial_window_height, settings.custom_aw, settings.custom_ah);
+	aspect_fix(&ciolib_initial_window_width, &ciolib_initial_window_height, settings.custom_aw, settings.custom_ah);
 	ciolib_mode=settings.output_mode;
 	if(settings.startup_mode != SCREEN_MODE_CURRENT)
 		text_mode=screen_to_ciolib(settings.startup_mode);