Incorrect `might be used uninitialized' message

[talon@clark.net]

/* Demonstrates bug in egcs-2.91.66 on FreeBSD 3.2.  To see the bug,
   compile using:
   
          gcc -c token.c -g -Wall -O2 

   The bug is the warning:

     token.c:17: warning: `c' might be used uninitialized in this function

   egcs-2.91.60 on Solaris 2.6 reports this message twice.
*/


extern int getch();
extern int class();

int
token()
{
    int state = 1;

    while (1) {
	int c=0;
	c = getch();
	switch (state) {
	case 1: break;
	case 4: break;
	case 5: break;
	case 6: 
            {
	        switch (class(c)) {
	        default: break;
	        }
	    } break;
	case 7:	break;
	}
    }
}