Fix issue with pretokeniser and large negative numbers (<-32768)

Author: gfwilliams

lib/espruinotools.js

@@ -1,6 +1,6 @@
 // EspruinoTools bundle (https://github.com/espruino/EspruinoTools)
 // Created with https://github.com/espruino/EspruinoWebIDE/blob/master/extras/create_espruinotools_js.sh
-// Based on EspruinoWebIDE  0.79.14
+// Based on EspruinoWebIDE  0.79.15
 /**
  Copyright 2014 Gordon Williams (gw@pur3.co.uk)
 
@@ -37371,8 +37371,10 @@ global.esmangle = require('../lib/esmangle');
             resultCode += String.fromCharCode(LEX_RAW_INT8, val&255);
           else if (val>=-32768 && val<32768)
             resultCode += String.fromCharCode(LEX_RAW_INT16, val&255, (val>>8)&255);
-          else
+          else {
+            if (val<0) resultCode += "-"; // re-add the '-' we took off
             resultCode += tokenString;
+          }
         } else resultCode += tokenString;
       } else if (tokenId) {
         //console.log(JSON.stringify(tok.str)+" => "+tokenId);