Merge #11138: Compat: Simplify bswap_16 implementation

e40fa98 Simplify bswap_16 implementation (danra)

Pull request description:

  Simplify bswap_16 implementation on platforms which don't already have it defined.
  This has no effect on the generated assembly; it just simplifies the source code.

Tree-SHA512: 1c6ac1d187a2751da75256d12b6b890160d15246dd2c2b6a56748ec43482e3a5a3323be2910f07b42d3dc243a568c7412c26eaa036efec764436e988abd1c3f1

src/compat/byteswap.h

@@ -35,7 +35,7 @@
 #if HAVE_DECL_BSWAP_16 == 0
 inline uint16_t bswap_16(uint16_t x)
 {
-    return (x >> 8) | ((x & 0x00ff) << 8);
+    return (x >> 8) | (x << 8);
 }
 #endif // HAVE_DECL_BSWAP16