perf_counter tools: Replace isprint() with issane()

The Git utils came with a ctype replacement that doesn't provide
isprint(). Add a replacement.

Solves a build bug on certain distros.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index cd74b2e..707f60c 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1266,7 +1266,7 @@
 			for (j = 0; j < 15-(i & 15); j++)
 				cdprintf("   ");
 			for (j = 0; j < (i & 15); j++) {
-				if (isprint(raw_event[i-15+j]))
+				if (issane(raw_event[i-15+j]))
 					cdprintf("%c", raw_event[i-15+j]);
 				else
 					cdprintf(".");