Fix format string in signal mask printing.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4989 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_signals.c b/coregrind/m_signals.c
index be10a51..b1a043f 100644
--- a/coregrind/m_signals.c
+++ b/coregrind/m_signals.c
@@ -725,7 +725,7 @@
       *oldset = VG_(threads)[tid].sig_mask;
       if (VG_(clo_trace_signals))
 	      VG_(message)(Vg_DebugExtraMsg, 
-			   "\toldset=%p %08x%08x",
+			   "\toldset=%p %s",
 			   oldset, format_sigset(oldset));
    }
    if (newset) {