Add #pragma once to headers

Author: coderofstuff

src/personal_message.h

@@ -21,6 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *****************************************************************************/
+#pragma once
+
 #include <stdint.h>
 #include <stdbool.h>
 

src/sighash.h

@@ -21,6 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *****************************************************************************/
+#pragma once
+
 #include <stdint.h>
 #include "./transaction/types.h"