[PATCH] mercurial/parsers.c: fix compiler warning

[Abhay Kadam]

# HG changeset patch
# User Abhay Kadam <abhaykadam88 at gmail.com>
# Date 1384669735 -19800
#      Sun Nov 17 11:58:55 2013 +0530
# Node ID 9eb232aa2fe76ed1b76f6bec012a2d155322769a
# Parent  aa80446aacc3b1574211649cd8f190250b6b04b3
mercurial/parsers.c: fix compiler warning

When try to compile on x64 OS X, I get this warning:

mercurial/parsers.c:931:27: warning: implicit conversion loses integer precision
: 'long' to 'int' [-Wshorten-64-to-32]
                        ? 4 : self->raw_length / 2;

The patch verifies if value of self->raw_length falls bellow INT_MAX; if not,
it raises the ValueError exception.

If value of self->raw_length is greater than 4, it's casted to int type, to eliminate the warning.

diff -r aa80446aacc3 -r 9eb232aa2fe7 mercurial/parsers.c
--- a/mercurial/parsers.c	Wed Nov 06 12:53:39 2013 -0500
+++ b/mercurial/parsers.c	Sun Nov 17 11:58:55 2013 +0530
@@ -927,8 +927,12 @@
 static int nt_init(indexObject *self)
 {
 	if (self->nt == NULL) {
+    if (self->raw_length > INT_MAX) {
+      PyErr_SetString(PyExc_ValueError, "overflow in nt_init");
+      return -1;
+    }
 		self->ntcapacity = self->raw_length < 4
-			? 4 : self->raw_length / 2;
+			? 4 : (int)self->raw_length / 2;
 		self->nt = calloc(self->ntcapacity, sizeof(nodetree));
 		if (self->nt == NULL) {
 			PyErr_NoMemory();