admin: handle errors while decoding URLs
#9 0x7f1fb8b06ee7 in __cxa_throw (/usr/lib64/libstdc++.so.6+0xb7ee7) (BuildId: c74eca671e2dd0f063706372d103f8acef88f1e3)
#10 0x7f1fb808645b in Poco::URI::decode(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>&, bool) (/usr/lib64/libPocoFoundation.so.92+0x15145b) (BuildId: 32601204eb877c998d0122c4bef1c7c08c8d0285)
#11 0x55a887e4bb8b in Util::decodeURIComponent(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) /home/vmiklos/git/collaboraonline/online-fuzz/common/Util.cpp:830:9
#12 0x55a8874b7547 in AdminSocketHandler::handleMessage(std::vector<char, std::allocator<char>> const&) /home/vmiklos/git/collaboraonline/online-fuzz/wsd/Admin.cpp:392:20
Signed-off-by: Miklos Vajna <vmiklos@collabora.com>
Change-Id: I87f358d218e8774d5c82f1fb12e2f56898e7581e
c97e4e2720