Improve debug log formatting.
TRAC #15791
Signed-off-by: Daniel Koch

Author:    Nicolas Capens

git-svn-id: https://angleproject.googlecode.com/svn/trunk@568 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/common/debug.h b/src/common/debug.h
index e12abf5..9828ecf 100644
--- a/src/common/debug.h
+++ b/src/common/debug.h
@@ -63,7 +63,7 @@
 #if defined(ANGLE_DISABLE_TRACE) && defined(ANGLE_DISABLE_PERF)
 #define EVENT(message, ...) (void(0))
 #else
-#define EVENT(message, ...) gl::ScopedPerfEventHelper scopedPerfEventHelper ## __LINE__("%s\n" message, __FUNCTION__, __VA_ARGS__);
+#define EVENT(message, ...) gl::ScopedPerfEventHelper scopedPerfEventHelper ## __LINE__(__FUNCTION__ message "\n", __VA_ARGS__);
 #endif
 
 // A macro asserting a condition and outputting failures to the debug log