Fix compilation problem against older MQ version (#189)

Author: ibmmqmet

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 Newest updates are at the top of this file.
 
+## Jul 23 2022 - v5.3.1
+- Fix #189 compile problem
+
 ## Jun 23 2022 - v5.3.0
 - Update for MQ 9.3.0
 - ibmmq - Add MQI parameters for keystore passwords

ibmmq/mqiMQSCO.go

@@ -38,8 +38,8 @@ void setScoKeyRepoPassword(MQSCO *mqsco, PMQCHAR keyRepoPassword, MQLONG length)
     mqsco->KeyRepoPasswordPtr = keyRepoPassword;
   }
 #else
-  if (keyRepoPasswordPtr != NULL) {
-    free(keyRepoPasswordPtr);
+  if (keyRepoPassword != NULL) {
+    free(keyRepoPassword);
   }
 #endif
 }