perf trace/scripting: Check return val of perl_run()

The return value from perl_run() is currently ignored, but it
should be checked and used to exit perf if there are problems
loading the script.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
LKML-Reference: <1260867220-15699-4-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

tools/perf/util/trace-event-perl.c

@@ -379,7 +379,11 @@ static int perl_start_script(const char *script, int argc, const char **argv)
 		goto error;
 	}
 
-	perl_run(my_perl);
+	if (perl_run(my_perl)) {
+		err = -1;
+		goto error;
+	}
+
 	if (SvTRUE(ERRSV)) {
 		err = -1;
 		goto error;