Suppress signedness comparison warnings in tests

tests/Unit/lazysmallbitvector.cpp

@@ -34,7 +34,7 @@ BOOST_AUTO_TEST_CASE(TestSetAndRead) {
 
   // Test small
   BitVector.set(0);
-  BOOST_TEST(BitVector.requiredBits() == 1);
+  BOOST_TEST(BitVector.requiredBits() == 1U);
   BOOST_TEST(BitVector[0] == true);
   BOOST_TEST(BitVector[1] == false);
   BOOST_TEST(BitVector[1000] == false);

tests/Unit/stackanalysis.cpp

@@ -170,5 +170,5 @@ BOOST_AUTO_TEST_CASE(TestASSlot) {
   // Test usage in a map
   std::map<ASSlot, int> Map;
   Map[SP1Slot] = 0;
-  BOOST_TEST(Map.count(SP1Slot) != 0);
+  BOOST_TEST(Map.count(SP1Slot) != 0U);
 }