don't use zero-size array to make pedantic gcc happy

binsearch.c

@@ -72,9 +72,4 @@ int main(void) {
 
   assert(binsearch(c, 1, 0) == 0);
   assert(binsearch(c, 1, 1) == -1);
-
-  int d[0];
-  assert_sorted(d, 1);
-
-  assert(binsearch(d, 0, 0) == -1);
 }