util/coretmpl.h: Added constexpr to the bitswap with explicit count.

This was a hangover from poor implementation of constexpr in older compilers.

src/lib/util/coretmpl.h

@@ -654,7 +654,7 @@ template <typename T, typename U, typename... V> constexpr T bitswap(T val, U b,
 ///   bit of the input.  Specify bits in the order they should appear in
 ///   the output field, from most significant to least significant.
 /// \return The extracted bits packed into a right-aligned field.
-template <unsigned B, typename T, typename... U> T bitswap(T val, U... b) noexcept
+template <unsigned B, typename T, typename... U> constexpr T bitswap(T val, U... b) noexcept
 {
 	static_assert(sizeof...(b) == B, "wrong number of bits");
 	static_assert((sizeof(std::remove_reference_t<T>) * 8) >= B, "return type too small for result");

src/mame/gaelco/gaelco2.h

@@ -1,13 +1,20 @@
 // license:BSD-3-Clause
 // copyright-holders:Manuel Abadia, David Haywood
+#ifndef MAME_GAELCO_GAELCO2_H
+#define MAME_GAELCO_GAELCO2_H
+
+#pragma once
+
 #include "cpu/m68000/m68000.h"
-#include "video/bufsprite.h"
 #include "machine/74259.h"
 #include "machine/eepromser.h"
 #include "machine/timer.h"
+#include "video/bufsprite.h"
+
 #include "emupal.h"
 #include "tilemap.h"
 
+
 class gaelco2_state : public driver_device
 {
 public:
@@ -180,3 +187,5 @@ class wrally2_state : public gaelco2_state
 
 	u8 m_analog_ports[2]{};
 };
+
+#endif // MAME_GAELCO_GAELCO2_H