latest autoconf/automake update

configure

@@ -5137,7 +5137,7 @@ MAGICK_PATCHLEVEL_VERSION=3
 
 MAGICK_VERSION=6.9.13-3
 
-MAGICK_GIT_REVISION=844f1d7d7:20231225
+MAGICK_GIT_REVISION=95af4e041:20231227
 
 
 # Substitute library versioning
@@ -5171,7 +5171,7 @@ PACKAGE_LIB_VERSION=0x69D
 
 PACKAGE_LIB_VERSION_NUMBER=6,9,13,3
 
-PACKAGE_RELEASE_DATE=2023-12-25
+PACKAGE_RELEASE_DATE=2023-12-27
 
 
 # Ensure that make can run correctly
@@ -11351,7 +11351,8 @@ else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <unistd.h>
-          main () {
+          #include <stdlib.h>
+          int main () {
           exit(!(sizeof(off_t) == 8));
         }
 int
@@ -11378,6 +11379,9 @@ fi
 
         ;;
     *)
+        if test "$ac_cv_sys_file_offset_bits" = ''; then
+            ac_cv_sys_file_offset_bits=64;
+        fi
         LFS_CPPFLAGS="$LFS_CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
         ;;
     esac