umult16 - integer multiplication with overflow checking

       umult16 does c=a*b and returns 1.

       In case of an integer overflow, umult16 leaves c alone and returns 0.

       umult16 - integer multiplication with overflow checking

imult16(3), imult32(3), imult64(3)

                                                                                                      umult16(3)

#include<libowfat/safemult.h>

       int umult16(uint16 a,uint16 b,uint16* c);