On LLP64 systems (like 64-bit Windows) long is 32 bits while pointers
are 64 bits, which results in a warning similar to the following:

warning C4244: 'return': conversion from '__int64' to 'long', possible loss of 
data

for HAVE_STACK_GROWS_UPWARDS.  Fix this by using the ptrdiff_t type
introduced by C99 for this purpose.

Signed-off-by: Kevin Locke <ke...@kevinlocke.name>
---
 tools/configurator/configurator.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/configurator/configurator.c 
b/tools/configurator/configurator.c
index a43061b..2acb0b2 100644
--- a/tools/configurator/configurator.c
+++ b/tools/configurator/configurator.c
@@ -298,7 +298,8 @@ static struct test tests[] = {
          "     return __stop_mysec - __start_mysec;\n"
          "}\n" },
        { "HAVE_STACK_GROWS_UPWARDS", DEFINES_EVERYTHING|EXECUTE, NULL, NULL,
-         "static long nest(const void *base, unsigned int i)\n"
+         "#include <stddef.h>\n"
+         "static ptrdiff_t nest(const void *base, unsigned int i)\n"
          "{\n"
          "     if (i == 0)\n"
          "             return (const char *)&i - (const char *)base;\n"
-- 
2.9.3

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