Follow raw pointer and sp<> conventions

Unconditional delete for raw pointers.
Use "if (sp != 0)" not "if (sp.get() != 0)" or "if (sp != NULL)".
Use "if (raw != NULL)" not "if (raw)".

Change-Id: I531a8da7c37149261ed2f34b862ec4896a4b785b
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index c3252e7..4507e5d 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -559,7 +559,7 @@
         if (status != NO_ERROR) {
             return status;
         }
-        if (numEffects) {
+        if (numEffects != NULL) {
             *numEffects = (uint32_t)reply.readInt32();
         }
         return NO_ERROR;