rtla/timerlat: Exit top main loop on any non-zero wait_retval

Comparing to exactly 1 will fail if more than one ring buffer
event was seen since the last call to timerlat_bpf_wait(), which
can happen in some race scenarios.

Signed-off-by: Crystal Wood <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Tomas Glozar <[e-mail]>

tools/tracing/rtla/src/timerlat_top.c

···
 		if (!params->common.quiet)
 			timerlat_print_stats(tool);
 
-		if (wait_retval == 1) {
+		if (wait_retval != 0) {
 			/* Stopping requested by tracer */
 			actions_perform(&params->common.threshold_actions);