PCP Updates: Memory Management Regressions in __pmFetchInterp()

These regressions, caused by my archive interpolation mode performance 
improvements, were caught by the qa tests 459 and 1079

Dave

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Changes committed to git://git.pcp.io/brolley/pcp interp-performance

Dave Brolley (1):
       Fix memory management regressions in __pmFetchInterp().

  src/libpcp/src/interp.c |   37 +++++++++++++++++--------------------
  1 file changed, 17 insertions(+), 20 deletions(-)

commit 216ee05026bc6cf41c07a606b3fae02c014a16a9
Author: Dave Brolley <[email protected]>
Date:   Tue Feb 14 13:51:35 2017 -0500

     Fix memory management regressions in __pmFetchInterp().

     - Don't use the return code of pmGetInDomArchive(3) to pre-allocate
       the hash table of instances, unless it is greater than zero.

     - Reduce the chance of a memory leak of the return buffer on error
       by waiting to allocate it until it is needed.

     These changes fix regressions in qa test cases 459 and 1079.


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