Fix trace message.
Fix trace message.

twitter/CocoaSPDY,kouhao/CocoaSPDY,johnkdoe/CocoaSPDY,kouhao/CocoaSPDY,twitter/CocoaSPDY,kgoodier/CocoaSPDY,kgoodier/CocoaSPDY,treejames/CocoaSPDY,twitter/CocoaSPDY,treejames/CocoaSPDY,treejames/CocoaSPDY,johnkdoe/CocoaSPDY