rv: Fix addition on an uninitialized variable 'run'

The variable run is not initialized however it is being accumulated
by the return value from the call to ikm_run_monitor.  Fix this by
initializing run to zero at the start of the function.

Link: https://lkml.kernel.org/r/20230424094730.105313-1-colin.i.king@gmail.com

Fixes: 4bc4b131 ("rv: Add rv tool")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

tools/verification/rv/src/rv.c

@@ -74,7 +74,7 @@ static void rv_list(int argc, char **argv)
 static void rv_mon(int argc, char **argv)
 {
 	char *monitor_name;
-	int i, run;
+	int i, run = 0;
 
 	static const char *const usage[] = {
 		"",