Remove simple compilation warnings for tests

test/hton.cpp

@@ -11,7 +11,7 @@ using namespace std;
 
 
 int 
-main (int argc, char **argv) {
+main (int, char **) {
 
     uint16_t u16 = 0x1358;
     uint32_t u32 = 0x12345678;

test/ip.cpp

@@ -12,7 +12,7 @@ using namespace std;
 
 
 int
-main (int argc, char **argv) {
+main (int, char **) {
     struct ip_test {
         const char     *str;
         const ipv4::ip  ip;

test/pool.cpp

@@ -52,10 +52,10 @@ check_keep_value (void) {
 
     // Give every item a unique value
     for (unsigned int i = 0; i < uintpool.capacity (); ++i) {
-        uint64_t *uint = uintpool.acquire ();
-        *uint = i;
+        uint64_t *item = uintpool.acquire ();
+        *item = i;
 
-        uintvector.push_back(uint);
+        uintvector.push_back(item);
     }
     check (uintvector.size () == uintpool.capacity ());
 
@@ -79,7 +79,7 @@ check_keep_value (void) {
 
 
 int 
-main (int argc, char **argv) {
+main (int, char **) {
     check_single ();
     check_unique_ptr ();
     check_keep_value ();