Drop code to handle compilers lacking the 'bool' type.

SWIG requires an ISO C++ compiler, so this is no longer useful.  Fixes
issue#513.

Source/Modules/swigmod.h

@@ -18,12 +18,6 @@
 #include "preprocessor.h"
 #include "swigwarn.h"
 
-#if !defined(HAVE_BOOL)
-typedef int bool;
-#define true ((bool)1)
-#define false ((bool)0)
-#endif
-
 #define NOT_VIRTUAL     0
 #define PLAIN_VIRTUAL   1
 #define PURE_VIRTUAL    2

configure.ac

@@ -40,11 +40,6 @@ AC_DEFINE_UNQUOTED(SWIG_PLATFORM, ["$host"], [Platform that SWIG is built for])
 dnl Checks for header files.
 AC_HEADER_STDC
 
-dnl Checks for types.
-AC_LANG_PUSH([C++])
-AC_CHECK_TYPES([bool])
-AC_LANG_POP([C++])
-
 dnl Look for popen
 AC_ARG_WITH(popen, AS_HELP_STRING([--without-popen], [Disable popen]), with_popen="$withval")
 if test x"${with_popen}" = xno ; then