Avoid mixing signed and unsigned (cf. r4584)

examples/basic_examples/vector_scal_cpu.c

@@ -71,10 +71,10 @@ void scal_sse_func(void *buffers[], void *cl_arg)
 	for (i = 0; i < n_iterations; i++)
 		VECTOR[i] = _mm_mul_ps(FACTOR, VECTOR[i]);
 
-	int remainder = n%4;
+	unsigned int remainder = n%4;
 	if (remainder != 0)
 	{
-		int start = 4 * n_iterations;
+		unsigned int start = 4 * n_iterations;
 		for (i = start; i < start+remainder; ++i)
 		{
 			vector[i] = factor * vector[i];