Fix conditional log line in MediaPlayerService

Bug: 226269879
Change-Id: Ica5efa418d37ada5d5516f3a1026b6c285ad6e12
Test: Fixes compilation when debugging is enabled
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 8e19d02..fdcf246 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -2683,7 +2683,7 @@
     // This is a benign busy-wait, with the next data request generated 10 ms or more later;
     // nevertheless for power reasons, we don't want to see too many of these.
 
-    ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
+    ALOGV_IF(actualSize == 0 && buffer.size() > 0, "callbackwrapper: empty buffer returned");
     unlock();
     return actualSize;
 }