Fix - features: Length links wasn't operating correctly with an initial default page length of -1 (all rows)
Fix - features: Length links wasn't operating correctly with an initial default page length of -1 (all rows)

- DataTables uses -1 as the infinite page length number, so having a
  default of -1 in this plug-in causes a conflict.
- This fixes #210 - thanks `malte-witt` for the test case and bug report

afelicioni/DataTables-Plugins,eveoh/Plugins,radlr/Plugins,NomadeLampe/Plugins,NomadeLampe/Plugins,etd-framework/datatables-plugins,SGCreations/Plugins,NomadeLampe/Plugins,afelicioni/DataTables-Plugins,SGCreations/Plugins,ashishraikar/Plugins,ashishraikar/Plugins,etd-framework/datatables-plugins,ashishraikar/Plugins,eveoh/Plugins,eveoh/Plugins,radlr/Plugins,radlr/Plugins,etd-framework/datatables-plugins,afelicioni/DataTables-Plugins,SGCreations/Plugins