Fixed crash when trying to delete a page

[Fannon]

Hi there,

I'm getting an upload error when trying to delete a page on MediaWiki 1.25.2

This seems to be due to a misreferenced variable name. The pull-request fixes the problem for me.

All the best!
Simon

> ReferenceError: because is not defined
ReferenceError: because is not defined
    at c:\Development\mobo\node_modules\nodemw\lib\bot.js:474:54
    at c:\Development\mobo\node_modules\nodemw\lib\bot.js:419:5
    at Request._callback (c:\Development\mobo\node_modules\nodemw\lib\api.js:213:5)
    at Request.self.callback (c:\Development\mobo\node_modules\nodemw\node_modules\request\request.js:354:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (c:\Development\mobo\node_modules\nodemw\node_modules\request\request.js:1207:14)
    at emitOne (events.js:82:20)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (c:\Development\mobo\node_modules\nodemw\node_modules\request\request.js:1153:12)
    at emitNone (events.js:72:20)
    at IncomingMessage.emit (events.js:166:7)
    at endReadableNT (_stream_readable.js:893:12)
    at doNTCallback2 (node.js:430:9)
    at process._tickCallback (node.js:344:17)

[macbre]

#75 fixes the same issue - thanks guys :)