Use path info from Issue 23 when path info from Issue 21 is n/a.
Use path info from Issue 23 when path info from Issue 21 is n/a.

git-svn-id: 2bf5607321a7b9efc1ae3817871b0819d8c9bd49@43 376947f0-c9f5-11de-8861-c343c794f7e0

imrehg/pylibnidaqmx-clone,imrehg/pylibnidaqmx-clone