Bug 1915397 - fix resource leak in morkFactory::​MakeHeap(). r=BenC

CID: 221061

Differential Revision: https://phabricator.services.mozilla.com/D223680

--HG--
extra : rebase_source : d6fb2804f2cbcad5dcbdb78c1ae7ef66cb271d06
extra : amend_source : 79fd056748066b76fe3676e50b9e0596c4dd83bd

mailnews/db/mork/morkFactory.cpp

@@ -46,6 +46,8 @@
 #ifndef _MORKWRITER_
 #  include "morkWriter.h"
 #endif
+#include "prmem.h"
+
 // 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
 
 // ````` ````` ````` ````` `````
@@ -242,6 +244,7 @@ morkFactory::MakeHeap(nsIMdbEnv* mev, nsIMdbHeap** acqHeap) {
   }
   MORK_ASSERT(acqHeap);
   if (acqHeap) *acqHeap = outHeap;
+  else PR_Free(outHeap);
   return outErr;
 }
 // } ----- end heap methods -----