Added informative comment in task 5.07

ch_5/task_07/main.c

@@ -37,7 +37,7 @@ void initialize_array (int* array, int size) {
     /* Iterate over all elements of the array */
     for (int i=0; i<size; i++) {
         /* Set current element to 0 */
-        array[i] = 0;
+        array[i] = 0;   // is equivalent to: *(array+i) = 0;
     }
     /* A void function has nothing to return */
     return;