Combine MBFL_ENCTYPE_MWC2{BE,LE} constants

These constants indicate that a text encoding uses 2+ bytes for each character,
and is either big endian or little endian (respectively). But nothing in
mbstring cares about the difference between MBFL_ENCTYPE_MWC2BE and
MBFL_ENCTYPE_MWC2LE.

(Actually, nothing cares about whether these flags are set at all...
maybe we should just remove them?)

Author: alexdowad

ext/mbstring/libmbfl/filters/mbfilter_utf16.c

@@ -40,7 +40,7 @@ const mbfl_encoding mbfl_encoding_utf16 = {
 	"UTF-16",
 	mbfl_encoding_utf16_aliases,
 	NULL,
-	MBFL_ENCTYPE_MWC2BE,
+	MBFL_ENCTYPE_MWC2,
 	&vtbl_utf16_wchar,
 	&vtbl_wchar_utf16
 };
@@ -51,7 +51,7 @@ const mbfl_encoding mbfl_encoding_utf16be = {
 	"UTF-16BE",
 	NULL,
 	NULL,
-	MBFL_ENCTYPE_MWC2BE,
+	MBFL_ENCTYPE_MWC2,
 	&vtbl_utf16be_wchar,
 	&vtbl_wchar_utf16be
 };
@@ -62,7 +62,7 @@ const mbfl_encoding mbfl_encoding_utf16le = {
 	"UTF-16LE",
 	NULL,
 	NULL,
-	MBFL_ENCTYPE_MWC2LE,
+	MBFL_ENCTYPE_MWC2,
 	&vtbl_utf16le_wchar,
 	&vtbl_wchar_utf16le
 };

ext/mbstring/libmbfl/mbfl/mbfl_consts.h

@@ -34,8 +34,7 @@
 #define MBFL_ENCTYPE_SBCS		0x00000001 /* single-byte encoding */
 #define MBFL_ENCTYPE_MBCS		0x00000002 /* multi-byte encoding */
 #define MBFL_ENCTYPE_WCS2		0x00000010 /* 2 bytes/char */
-#define MBFL_ENCTYPE_MWC2BE		0x00000040 /* 2+ bytes/char, big endian */
-#define MBFL_ENCTYPE_MWC2LE		0x00000080 /* 2+ bytes/char, little endian */
+#define MBFL_ENCTYPE_MWC2		0x00000040 /* 2+ bytes/char */
 #define MBFL_ENCTYPE_WCS4		0x00000100 /* 4 bytes/char */
 #define MBFL_ENCTYPE_GL_UNSAFE	0x00004000