Implement idea from Mike Alexander (in #346063) to key lot scrubbing

off the environment variable GNC_AUTO_SCRUB_LOTS instead of commenting
it out of the code.  This make it easier for developers to test/users
to try lot scrubbing.


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@15791 57a11ea4-9604-0410-9ed3-97b8803252fd

src/engine/Transaction.c

@@ -1021,7 +1021,8 @@ xaccTransCommitEdit (Transaction *trans)
      /* Get the cap gains into a consistent state as well. */
      
      /* Lot Scrubbing is temporarily disabled. */
-     //xaccTransScrubGains (trans, NULL);
+     if (g_getenv("GNC_AUTO_SCRUB_LOTS") != NULL)
+         xaccTransScrubGains (trans, NULL);
 
      /* Allow scrubbing in transaction commit again */
      scrub_data = 1;