Define HAVE_STRCASECMP and HAVE_STRNCASECMP on MS-Windows.

 src/s/ms-w32.h (strcasecmp, strncasecmp) [_MSC_VER]: Redirect to
 _stricmp and _strnicmp.
 (HAVE_STRCASECMP, HAVE_STRNCASECMP): Define to 1.

src/ChangeLog

+2012-06-26  Eli Zaretskii  <eliz@gnu.org>
+
+	* s/ms-w32.h (strcasecmp, strncasecmp) [_MSC_VER]: Redirect to
+	_stricmp and _strnicmp.
+	(HAVE_STRCASECMP, HAVE_STRNCASECMP): Define to 1.
+
 2012-06-26  Dmitry Antipov  <dmantipov@yandex.ru>
 
 	* alloc.c (allocate_window): Zero out non-Lisp part of newly

src/s/ms-w32.h

@@ -165,6 +165,14 @@ struct sigaction {
 #undef  HAVE_AIX_SMT_EXP
 #define USE_TOOLKIT_SCROLL_BARS 1
 
+/* MinGW has these in its library; MSVC doesn't.  */
+#ifdef _MSC_VER
+#define strcasecmp(s1,s2)  _stricmp(s1,s2)
+#define strncasecmp(s1,s2) _strnicmp(s1,s2)
+#endif
+#define HAVE_STRCASECMP 1
+#define HAVE_STRNCASECMP 1
+
 /* Define if you have the ANSI `strerror' function.
    Otherwise you must have the variable `char *sys_errlist[]'.  */
 #define HAVE_STRERROR 1