make operator< const

diff --git a/lib/dvb/pmt.h b/lib/dvb/pmt.h
index 185000d..95d3cc4 100644 (file)
--- a/lib/dvb/pmt.h
+++ b/lib/dvb/pmt.h
@@ -132,7 +132,7 @@ public:
                        int teletext_magazine_number;  // used for teletext subtitles
                };
                std::string language_code;
-               bool operator<(const subtitleStream &s)
+               bool operator<(const subtitleStream &s) const
                {
                        if (pid != s.pid)
                                return pid < s.pid;