display: Fix warnings

Treat warnings as errors again

Change-Id: Ibd7f484d31ad420b85e82fd5183d70bf7dce4bfa
diff --git a/libgralloc/ionalloc.cpp b/libgralloc/ionalloc.cpp
index 73bbe23..23e225d 100644
--- a/libgralloc/ionalloc.cpp
+++ b/libgralloc/ionalloc.cpp
@@ -28,6 +28,7 @@
  */
 
 #define DEBUG 0
+#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <stdlib.h>
@@ -41,7 +42,6 @@
 using gralloc::IonAlloc;
 
 #define ION_DEVICE "/dev/ion"
-#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
 
 int IonAlloc::open_device()
 {