fix leak in audio policy effect config parser

Free temporary effect descriptors created in
loadAudioEffectConfig().

Bug 19021726.

Change-Id: Icd44216e25df3fe683a01763d7e8a7b84f367a1a
diff --git a/services/audiopolicy/AudioPolicyEffects.cpp b/services/audiopolicy/AudioPolicyEffects.cpp
index 4fbe042..e6ace20 100644
--- a/services/audiopolicy/AudioPolicyEffects.cpp
+++ b/services/audiopolicy/AudioPolicyEffects.cpp
@@ -658,6 +658,10 @@
     loadInputEffectConfigurations(root, effects);
     loadStreamEffectConfigurations(root, effects);
 
+    for (size_t i = 0; i < effects.size(); i++) {
+        delete effects[i];
+    }
+
     config_free(root);
     free(root);
     free(data);