Add missing ENGINE_free's to correctly release the structural referen…

…ces.

Change-Id: Ib61eb27ba89de6f5a6fbce6e85fc913d201042c0
Signed-off-by: Steve Linsell <stevenx.linsell@intel.com>

e_qat.c

@@ -251,9 +251,12 @@ CpaInstanceHandle get_next_inst(void)
     if(!qat_engine_init(e)){
         WARN("Failure in qat_engine_init function\n");
         instance_handle = NULL;
+        ENGINE_free(e);
         return instance_handle;
     }
 
+    ENGINE_free(e);
+
     /* Anytime we use external polling then we want to loop
        through the instances. Any time we are using internal polling
        then we also want to loop through the instances assuming
@@ -294,6 +297,7 @@ static void engine_init_child_at_fork_handler(void)
         WARN("Failure in qat_engine_init function\n");
         QATerr(QAT_F_ENGINE_INIT_CHILD_AT_FORK_HANDLER, QAT_R_ENGINE_INIT_FAILURE);
     }
+    ENGINE_free(e);
 }
 
 
@@ -316,6 +320,7 @@ static void engine_finish_before_fork_handler(void)
     }
 
     qat_engine_finish_int(e, QAT_RETAIN_GLOBALS);
+    ENGINE_free(e);
 
     keep_polling = 1;
 }