ALL: Remove obsolete register keyword

The register keyword was deprecated from the C++11 standard,
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4193.html#809>,
and removed from the C++17 standard,
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4340>, so
cannot exist in a well-formed C++17 program.

It has never done anything in GCC
<https://gcc.gnu.org/ml/gcc/2010-05/msg00113.html>
and because of the way it is specified in the standard, it is “as
meaningful as whitespace”
<http://www.drdobbs.com/keywords-that-arent-or-comments-by-anoth/184403859>.

The one remaining use of the register keyword is in the DS backend,
where it is used to create a local register variable using the
non-standard GCC Extended Asm feature.

Closes gh-1079.

1 files changed, 1 insertions, 1 deletions

diff --git a/graphics/scaler/hq2x.cpp b/graphics/scaler/hq2x.cpp
index 74ceebd611..7efbef305c 100644
--- a/graphics/scaler/hq2x.cpp
+++ b/graphics/scaler/hq2x.cpp
@@ -103,7 +103,7 @@ extern "C" uint32   *RGBtoYUV;
  */
 template<typename ColorMask>
 static void HQ2x_implementation(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
-	register int w1, w2, w3, w4, w5, w6, w7, w8, w9;
+	int w1, w2, w3, w4, w5, w6, w7, w8, w9;
 
 	const uint32 nextlineSrc = srcPitch / sizeof(uint16);
 	const uint16 *p = (const uint16 *)srcPtr;