MINOR: stats: make CSV report server check status only when enabled

The HTML version doesn't report a check status when the server is in
maintenance since it can be quite old and irrelevant. The CSV forgot
to care about that, so let's do it here as well.
diff --git a/src/dumpstats.c b/src/dumpstats.c
index 53131ab..ef7fdbd 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -3729,7 +3729,7 @@
 	stats[ST_F_RATE]     = mkf_u32(FN_RATE, read_freq_ctr(&sv->sess_per_sec));
 	stats[ST_F_RATE_MAX] = mkf_u32(FN_MAX, sv->counters.sps_max);
 
-	if (sv->check.state & CHK_ST_ENABLED) {
+	if ((sv->check.state & (CHK_ST_ENABLED|CHK_ST_PAUSED)) == CHK_ST_ENABLED) {
 		const char *fld_chksts;
 
 		fld_chksts = chunk_newstr(out);