Ignore --height option if it's not supported on the platform

This is to make shell integration work out of the box on Git bash.

  eval "$(fzf --bash)"
  vim <CTRL-T>
    # would print '--height option is currently not supported on this platform'

src/options.go

@@ -2685,10 +2685,6 @@ func validateOptions(opts *Options) error {
 		}
 	}
 
-	if !tui.IsLightRendererSupported() && opts.Height.size > 0 {
-		return errors.New("--height option is currently not supported on this platform")
-	}
-
 	if opts.Scrollbar != nil {
 		runes := []rune(*opts.Scrollbar)
 		if len(runes) > 2 {
@@ -2841,6 +2837,11 @@ func postProcessOptions(opts *Options) error {
 		theme.Spinner = boldify(theme.Spinner)
 	}
 
+	// If --height option is not supported on the platform, just ignore it
+	if !tui.IsLightRendererSupported() && opts.Height.size > 0 {
+		opts.Height = heightSpec{}
+	}
+
 	if err := opts.initProfiling(); err != nil {
 		return errors.New("failed to start pprof profiles: " + err.Error())
 	}

src/winpty_windows.go

@@ -24,12 +24,11 @@ func needWinpty(opts *Options) bool {
 		 See: https://github.com/junegunn/fzf/issues/3809
 
 		 "MSYS=enable_pcon" allows fzf to run properly on mintty 3.4.5 or later,
-		 however `--height` option still doesn't work, so let's just disable it.
+		 however `--height` option still doesn't work, and it's going to be ignored.
 
 		 We're not going to worry too much about restoring the original value.
 		*/
 		if strings.Contains(os.Getenv("MSYS"), "enable_pcon") {
-			opts.Height = heightSpec{}
 			return false
 		}