(svn r9846) -Codechange: introduced ZOOM_LVL_MIN and ZOOM_LVL_MAX for the obvious reasons

-Codechange: introduced ZOOM_LVL_DETAIL to show/remove details
-Codechange: changed << and >> operator with ZoomLevel to a simple wrapper (that in theory also allows zoom-in besides the current zoom-out)
-Fix r9845: missed some int -> ZoomLevel

src/texteff.cpp

@@ -351,8 +351,10 @@ void DrawTextEffects(DrawPixelInfo *dpi)
 			}
 			break;
 
-		default:
+		case ZOOM_LVL_OUT_4X:
 			break;
+
+		default: NOT_REACHED();
 	}
 }