Fixed bugs in Is() and IsNot() with false:undefined values.
Fixed bugs in Is() and IsNot() with false:undefined values.

rudy500/otrs,crythias/otrs,oiami/otrs,MBRG/otrs,xhoy/otrs,oiami/otrs,rudy500/otrs,brandonshults01/otrs,s7design/otrs,vlascoder/otrs,s7design/otrs,thorsteneckel/otrs,linearregression/otrs,moritz/otrs,thorsteneckel/otrs,muehlbauer/otrs,rudy500/otrs,PortgasDAce/otrs,brandonshults01/otrs,balazj/otrs,linearregression/otrs,balazj/otrs,rudy500/otrs,PortgasDAce/otrs,xhoy/otrs,MBRG/otrs,balazj/otrs,nilei/otrs,StCyr/otrs,thorsteneckel/otrs,nilei/otrs,s7design/otrs,brandonshults01/otrs,mbeijen/otrs-1,noritnk/otrs,linearregression/otrs,balazj/otrs,nilei/otrs,crythias/otrs,mburggraf/otrs,s7design/otrs,crythias/otrs,vlascoder/otrs,rudy500/otrs,eliasp/otrs,moritz/otrs,StCyr/otrs,thorsteneckel/otrs,oiami/otrs,eliasp/otrs,capeit-tto/otrs,nilei/otrs,mburggraf/otrs,balazj/otrs,oiami/otrs,vlascoder/otrs,StCyr/otrs,brandonshults01/otrs,moritz/otrs,muehlbauer/otrs,MBRG/otrs,mburggraf/otrs,nilei/otrs,MBRG/otrs,s7design/otrs,PortgasDAce/otrs,brandonshults01/otrs,crythias/otrs,mburggraf/otrs,noritnk/otrs,linearregression/otrs,PortgasDAce/otrs,eliasp/otrs,crythias/otrs,muehlbauer/otrs,capeit-tto/otrs,xhoy/otrs,mbeijen/otrs-1,StCyr/otrs,muehlbauer/otrs,MBRG/otrs,eliasp/otrs,moritz/otrs,mburggraf/otrs,xhoy/otrs,linearregression/otrs,noritnk/otrs,thorsteneckel/otrs,muehlbauer/otrs,PortgasDAce/otrs,oiami/otrs,eliasp/otrs,xhoy/otrs,StCyr/otrs,moritz/otrs,mbeijen/otrs-1,capeit-tto/otrs