The main-unix utility should free the return value to avoid leaks. (#1578)

Fixes #1545.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-main/main-unix-minimal.c

@@ -110,6 +110,9 @@ main (int argc,
     {
       break;
     }
+
+    jerry_release_value (ret_value);
+    ret_value = jerry_create_undefined ();
   }
 
   int ret_code = JERRY_STANDALONE_EXIT_CODE_OK;

jerry-main/main-unix.c

@@ -717,6 +717,9 @@ main (int argc,
       {
         break;
       }
+
+      jerry_release_value (ret_value);
+      ret_value = jerry_create_undefined ();
     }
   }