misc: small typo cleanup

Author: zpl-zak

include/enet.h

@@ -29,11 +29,11 @@
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * software.
+ * SOFTWARE.
  *
  */
-#ifndef enet_include_h
-#define enet_include_h
+#ifndef ENET_INCLUDE_H
+#define ENET_INCLUDE_H
 
 #include <assert.h>
 #include <stdlib.h>