Convert C (un)signed long long values to bignums properly. This patch also does the following: - Uses make_fixnum instead of make_integer when the argument is guaranteed to be in the fixnum range. - Introduces make_unsigned_integer so that we handle unsigned values with the high bit set correctly. - Introduces conversions between bignums and (un)signed long long values. - Uses mp_set_memory_functions with the BSD MP code, if it exists. - Eliminates some unnecessary consing in the Lisp + and * implementations. - Fixes a problem with check_valid_xbm_inline(). This function is called during intialization. It calls Ftimes. When using pdump, this is a problem, because (a) the bignum code is not initialized until *after* dumping, so we don't try to dump any bignums, and (b) multiplication of integers is done inside bignums so we handle fixnum overflow correctly. I decided that an XBM file with dimensions that don't fit into fixnums is probably not something we want to try to handle anyway, and did the arithmetic with C values instead of Lisp values. Doing that broke one test, which started getting a different error message from the one it expected, so I adjusted the test to match the new reality. - Fixes a few miscellaneous bugs in the BSD MP code. See <CAHCOHQk0u0=eD1fUMHTNWi2Yh=1WgiYyCXdMbsGzHBNhdqYz4w@mail.gmail.com> in xemacs-patches, as well as followup messages.

--- a/configure	Wed Apr 24 20:16:14 2013 -0400
+++ b/configure	Mon Jun 17 10:23:00 2013 -0600
@@ -20897,6 +20897,19 @@
   else
     { echo "Error:" "Required MP numeric support cannot be provided." >&2; exit 1; }
   fi
+  ac_fn_c_check_func "$LINENO" "mp_set_memory_functions" "ac_cv_func_mp_set_memory_functions"
+if test "x$ac_cv_func_mp_set_memory_functions" = xyes; then :
+  $as_echo "#define HAVE_MP_SET_MEMORY_FUNCTIONS 1" >>confdefs.h
+
+else
+  ac_fn_c_check_func "$LINENO" "__gmp_set_memory_functions" "ac_cv_func___gmp_set_memory_functions"
+if test "x$ac_cv_func___gmp_set_memory_functions" = xyes; then :
+  $as_echo "#define HAVE_MP_SET_MEMORY_FUNCTIONS 1" >>confdefs.h
+
+fi
+
+fi
+
   $as_echo "#define WITH_NUMBER_TYPES 1" >>confdefs.h
 
   $as_echo "#define WITH_MP 1" >>confdefs.h