FIX: ruler drawn on top of the tab bar

Wrap function lacked a condition to avoid drawing below 0.

internal/display/bufwindow.go

@@ -619,6 +619,8 @@ func (w *BufWindow) displayBuffer() {
 
 		wrap := func() {
 			vloc.X = 0
+
+			if vloc.Y >= 0 {
 				if w.hasMessage {
 					w.drawGutter(&vloc, &bloc)
 				}
@@ -630,6 +632,9 @@ func (w *BufWindow) displayBuffer() {
 				if b.Settings["ruler"].(bool) {
 					w.drawLineNum(lineNumStyle, true, &vloc, &bloc)
 				}
+			} else {
+				vloc.X = w.gutterOffset
+			}
 		}
 
 		type glyph struct {