Fix some memory leaks and use-after-free (cppcheck)

site_ansto/ansto_tclmotdriv.c

@@ -415,9 +415,12 @@ static int TclSetPar(void *self, SConnection * pCon, char *name,
       return OKOK;
     } else {
       pDriv->errorCode = PARANOTFOUND;
+      free(tclCommand);
+      free(tclCommandPara);;
       return 0;
     }
 
+    free(tclCommand);
     return OKOK;
   }
 }