Code simplification for timed allocate

Change-Id: I5acccd7418c5b4a4dc0112147c750fef9f74bf33
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index d5178b1..272175e 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1060,11 +1060,8 @@
     }
 
     sp<IMemory> newBuffer = mTimedMemoryDealer->allocate(size);
-    if (newBuffer == NULL) {
-        newBuffer = mTimedMemoryDealer->allocate(size);
-        if (newBuffer == NULL) {
-            return NO_MEMORY;
-        }
+    if (newBuffer == 0) {
+        return NO_MEMORY;
     }
 
     *buffer = newBuffer;