libmedia new can't fail on Android

Change-Id: Ie79dd5abb8078b35474bf0f1b3a6ff994a3a3360
diff --git a/media/libmedia/MediaScannerClient.cpp b/media/libmedia/MediaScannerClient.cpp
index 40b8188..9fe1820 100644
--- a/media/libmedia/MediaScannerClient.cpp
+++ b/media/libmedia/MediaScannerClient.cpp
@@ -173,6 +173,7 @@
             const char* source = mValues->getEntry(i);
             int targetLength = len * 3 + 1;
             char* buffer = new char[targetLength];
+            // don't normally check for NULL, but in this case targetLength may be large
             if (!buffer)
                 break;
             char* target = buffer;