Follow-up to r28979, eliminate Win32 C4715 warning, not all control paths return a value.
Follow-up to r28979, eliminate Win32 C4715 warning, not all control paths
return a value.

* subversion/libsvn_client/merge.c
  (calculate_left_hand_side): Return SVN_NO_ERROR at end.  There really isn't
  a problem, since all control paths return an error or abort, just trying
  to cut down on the noise.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion