Excuse, can I fix the test.cc file warning?

[Hebe970217]

#1 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:66: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to '__gnu_cxx::__normal_iterator<char *, std::__cxx11::basic_string<char, std::char_traits, std::allocator > >::difference_type' (aka 'long')

#2 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:67: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to '__gnu_cxx::__normal_iterator<char *, std::__cxx11::basic_string<char, std::char_traits, s std::allocator > >::difference_type' (aka 'long')

#3 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:67: warning: implicit conversion changes signedness: 'std::__cxx11::basic_string<char, std::char_traits, std::allocator >::size_type' (aka 'unsigned long') to '__gnu_cxx::__normal_iterator<char *, std::__cxx11::basic_string<char, std::char_traits, std::allocator > >::difference_type' (aka 'long')

#4 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:102: warning: unused parameter 'replacer'

#5 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:281: warning: unused parameter 'id'

#6 /home/funning/workspace/workspace/cclsTest/3dpatry/ccls/src/test.cc:353: warning: implicit conversion loses integer precision: 'int' to 'char'

[Hebe970217]

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