2021-01-02 15:12:17 (UTC-03:00)

Marcel Rodrigues <marcelgmr@gmail.com>

add include guards

diff --git a/qms.h b/qms.h
index b55af9e..67669c7 100644
--- a/qms.h
+++ b/qms.h
@@ -1,3 +1,6 @@
+#ifndef QMS_H
+#define QMS_H
+
 #include <stdint.h>
 
 #define NTRACKS     16
@@ -28,3 +31,5 @@ void qms_setnote(int track, int voice, int midipitch);
 void qms_advance(unsigned int nsamples);
 void qms_runevents(Event *evs, unsigned int nevs);
 void qms_putsample(int16_t left, int16_t right);
+
+#endif /* QMS_H */