Fix include guards

Macros starting with _ are reserved (see
http://www.gnu.org/software/libc/manual/html_node/Reserved-Names.html).
Fixes #440.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/main.h b/src/main.h
index 04f5203..9567e06 100644
--- a/src/main.h
+++ b/src/main.h
@@ -21,8 +21,8 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 
-#ifndef _MAIN_H
-#define _MAIN_H
+#ifndef SRC_MAIN_H_4ZGSCG6X
+#define SRC_MAIN_H_4ZGSCG6X
 
 #include <piano.h>
 #include <waitress.h>
@@ -45,5 +45,5 @@ typedef struct {
 	unsigned int playerErrors;
 } BarApp_t;
 
-#endif /* _MAIN_H */
+#endif /* SRC_MAIN_H_4ZGSCG6X */