Added test on how GC works where there are multiple transitions between NULLC and C.
Added test on how GC works where there are multiple transitions between NULLC and C.

WheretIB/nullc,WheretIB/nullc,WheretIB/nullc,WheretIB/nullc,WheretIB/nullc,WheretIB/nullc,WheretIB/nullc