tracks/c/exercises/sum-of-multiples/src/example.c in trackler-2.2.1.45 vs tracks/c/exercises/sum-of-multiples/src/example.c in trackler-2.2.1.46

@@ -4,13 +4,15 @@
 unsigned int sum_of_multiples(const unsigned int *multiples,
                               const size_t number_of_multiples,
                               const unsigned int upper_bound)
 {
    unsigned int sum = 0;
+   if (NULL == multiples)
+      return sum;
 
    for (unsigned int current = 1; current < upper_bound; current++) {
       for (size_t i = 0; i < number_of_multiples; i++) {
-         if ((current % multiples[i]) == 0) {
+         if (0 != multiples[i] && (current % multiples[i]) == 0) {
             sum += current;
             break;
          }
       }
    }