Added cast to time_t.

test/FileTest.cc

@@ -242,7 +242,7 @@ void FileTest::testUtime()
   
   a2_struct_stat buf;
   CPPUNIT_ASSERT(0 == a2stat(f.getPath().c_str(), &buf));
-  CPPUNIT_ASSERT_EQUAL((time_t)atime, buf.st_atime);
+  CPPUNIT_ASSERT_EQUAL((time_t)atime, (time_t)buf.st_atime);
   CPPUNIT_ASSERT_EQUAL((time_t)mtime, f.getModifiedTime().getTime());
 
   File notFound(A2_TEST_OUT_DIR"/aria2_FileTest_testUTime_notFound");