fix assert when calling speech_open without a pool

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12465 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core_speech.c

@@ -78,7 +78,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_speech_open(switch_speech_handle_t *
 	}
 
 	sh->rate = rate;
-	sh->name = switch_core_strdup(pool, module_name);
+	sh->name = switch_core_strdup(sh->memory_pool, module_name);
 	sh->samples = switch_samples_per_packet(rate, interval);
 	sh->samplerate = rate;
 	sh->native_rate = rate;