sparse segv with simple test

[Stephen Hemminger <shemminger@vyatta.com>]

I was checking up on some enum issues and tried running the following:
	sparse -Wenum-mismatch enum.c
It dies here:
gdb) run -Wenum-mismatch e.c
Starting program: /home/shemminger/src/sparse/sparse -Wenum-mismatch enum.c

Program received signal SIGSEGV, Segmentation fault.
0x0805c81d in linearize_store_gen (ep=0xb7e7600c, value=0xb7e4e00c, 
    ad=0xbfd43134) at linearize.h:293
293		return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_VAL);
(gdb) where
#0  0x0805c81d in linearize_store_gen (ep=0xb7e7600c, value=0xb7e4e00c, 
    ad=0xbfd43134) at linearize.h:293
#1  0x080609da in linearize_symbol (sym=0xb7e244cc) at linearize.c:1526
#2  0x080494bd in main (argc=-1209907772, argv=0xb7e245c4) at sparse.c:266
------
#include <stdio.h>

enum x { A, B, C };

static enum x foo(int n) {
	return (n > 0) ? A : B;
}

int main(int ac, char **av) {
	int x = foo(ac);
	enum x y = 99;

	printf("%d %d\n", x, y);
	return 0;
}