Fix test for valid stack pointer in profiling.  The error caused the profiler to report that the code was executing an "UNKNOWN" function.
Fix test for valid stack pointer in profiling.  The error caused the profiler to report that the code was executing an "UNKNOWN" function.

git-svn-id: 98787b36aaefbae4b30fa755be920954cd25e1e4@1823 ae7d391e-3f74-4a2b-a0db-a8776840fd2a

mn200/polyml,polyml/polyml,polyml/polyml,polyml/polyml,mn200/polyml,dcjm/polyml,mn200/polyml,dcjm/polyml,dcjm/polyml,mn200/polyml,polyml/polyml,dcjm/polyml