Try to fix clang and gcc warnings problems again x3

test/unittest/readertest.cpp

@@ -164,12 +164,12 @@ TEST(Reader, ParseNumber_Integer) {
             u.u |= r();
 
             char buffer[32];
-            if (u.u > 4294967295) {
+            if (u.u > uint64_t(4294967295u)) {
                 *internal::u64toa(u.u, buffer) = '\0';
                 TEST_INTEGER(ParseUint64Handler, buffer, u.u);
             }
 
-            if (u.i < -2147483648) {
+            if (u.i < -int64_t(2147483648u)) {
                 *internal::i64toa(u.i, buffer) = '\0';
                 TEST_INTEGER(ParseInt64Handler, buffer, u.i);
             }

test/unittest/strtodtest.cpp

@@ -16,6 +16,11 @@
 
 #include "rapidjson/internal/strtod.h"
 
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(unreachable-code)
+#endif
+
 #define BIGINTEGER_LITERAL(s) BigInteger(s, sizeof(s) - 1)
 
 using namespace rapidjson::internal;
@@ -121,3 +126,7 @@ TEST(Strtod, CheckApproximationCase) {
 
     EXPECT_EQ(-1, delta.Compare(hS));
 }
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif