[PATCH] m32r: update arch/m32r/mm/fault.c to fix a compile error

[PATCH] m32r: update arch/m32r/mm/fault.c to fix a  compile error

Here is a patch to update arch/m32r/mm/fault.c in order to fix
a compile error of -mm kernel for m32r.

	* arch/m32r/mm/fault.c:
	- Add the third parameter of expand_stack().
	  This modification is derived from
	  enforce-a-gap-between-heap-and-stack.patch;

	  "heap-stack-gap for 2.6" (Sep. 25, 2004)
	  http://www.uwsg.iu.edu/hypermail/linux/kernel/0409.3/0435.html

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>