Make sure files end with a newline

LICENSE.txt

@@ -200,4 +200,3 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
-

include/wadcpp/linedef.h

@@ -31,4 +31,4 @@ public:
 	uint16_t left_side;
 };
 
-#endif // WADCPP_LINEDEF_H
+#endif // WADCPP_LINEDEF_H

include/wadcpp/sidedef.h

@@ -33,4 +33,4 @@ public:
 	int16_t sector;
 };
 
-#endif // WADCPP_SIDEDEF_H
+#endif // WADCPP_SIDEDEF_H

include/wadcpp/vertex.h

@@ -24,4 +24,4 @@ public:
 	int16_t y;
 };
 
-#endif // WADCPP_VERTEX_H
+#endif // WADCPP_VERTEX_H