allow multi-include on some headers

[libpicofe.git] / readpng.h

diff --git a/readpng.h b/readpng.h
index 924b341..4bb7ba7 100644 (file)
--- a/readpng.h
+++ b/readpng.h
@@ -1,3 +1,6 @@
+#ifndef LIBPICOFE_READPNG_H
+#define LIBPICOFE_READPNG_H
+
 typedef enum
 {
        READPNG_BG = 1,
@@ -17,3 +20,5 @@ int writepng(const char *fname, unsigned short *src, int w, int h);
 #ifdef __cplusplus
 }
 #endif
+
+#endif // LIBPICOFE_READPNG_H