perf_counter, x86: consistent use of type int for counter index

The type of counter index is sometimes implemented as unsigned
int. This patch changes this to have a consistent usage of int.

[ Impact: cleanup ]

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-21-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index c3db52d..41aed42 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -318,7 +318,7 @@
 			unsigned long			config_base;
 			unsigned long			counter_base;
 			int				nmi;
-			unsigned int			idx;
+			int				idx;
 		};
 		union { /* software */
 			atomic64_t			count;