imult32 - integer multiplication with overflow checking

       imult32 does c=a*b and returns 1.

       In case of an integer overflow, imult32 leaves c alone and returns 0.

       imult32 - integer multiplication with overflow checking

imult16(3), umult32(3), imult64(3)

                                                                                                      imult32(3)

#include<libowfat/safemult.h>

       int imult32(int32 a,int32 b,int32* c);