Memory leak in 3rd party library

[even1024]

Address sanitizer detects the following issue during indigo api cpp tests:

7: ==3339==ERROR: LeakSanitizer: detected memory leaks
7: 
7: Direct leak of 256 byte(s) in 1 object(s) allocated from:
7:     #0 0x7fb3b82c2747 in malloc (/lib64/libasan.so.6+0xb4747)
7:     #1 0x7fb3b79c4109 in FcPatternObjectInsertElt (/lib64/libfontconfig.so.1+0x1f109)

Direct leak of 16 byte(s) in 1 object(s) allocated from:
    #0 0x7fb357fe1712 in __interceptor_calloc ../../../../src/libsanitizer/lsan/lsan_interceptors.cpp:76
    #1 0x5643d5bd3c5f in CreateOneStructureINChI /home/muf/sources/Indigo/third_party/inchi/INCHI_BASE/src/runichi.c:1127
    #2 0x5643d5bd266d in ProcessOneStructure /home/muf/sources/Indigo/third_party/inchi/INCHI_BASE/src/runichi.c:319
    #3 0x5643d5bd7e18 in ProcessOneStructureExCore /home/muf/sources/Indigo/third_party/inchi/INCHI_BASE/src/runichi.c:2753
    #4 0x5643d5bd5f60 in ProcessOneStructureEx /home/muf/sources/Indigo/third_party/inchi/INCHI_BASE/src/runichi.c:2003
    #5 0x5643d5b37c07 in GetINCHI1 /home/muf/sources/Indigo/third_party/inchi/INCHI_API/libinchi/src/inchi_dll.c:637
    #6 0x5643d5b36fc0 in GetINCHI /home/muf/sources/Indigo/third_party/inchi/INCHI_API/libinchi/src/inchi_dll.c:279
    #7 0x5643d5a7df35 in indigo::InchiWrapper::saveMoleculeIntoInchi(indigo::Molecule&, indigo::Array<char>&) /home/muf/sources/Indigo/core/indigo-core/molecule/src/inchi_wrapper.cpp:636
    #8 0x7fb3577bc3da in indigoInchiGetInchi /home/muf/sources/Indigo/api/c/indigo-inchi/src/indigo_inchi_api.cpp:163
    #9 0x5643d599bbbf in IndigoApiInchiTest_basic_Test::TestBody() /home/muf/sources/Indigo/api/c/tests/unit/tests/inchi.cpp:60
    #10 0x5643d5b20fd3 in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2599
    #11 0x5643d5b1945a in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2635
    #12 0x5643d5af563b in testing::Test::Run() /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2674
    #13 0x5643d5af60c2 in testing::TestInfo::Run() /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2853
    #14 0x5643d5af6a00 in testing::TestSuite::Run() /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:3012
    #15 0x5643d5b06777 in testing::internal::UnitTestImpl::RunAllTests() /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:5870
    #16 0x5643d5b22375 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2599
    #17 0x5643d5b1a550 in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:2635
    #18 0x5643d5b04d6e in testing::UnitTest::Run() /home/muf/sources/Indigo/third_party/googletest/src/gtest.cc:5444
    #19 0x5643d59a63cf in RUN_ALL_TESTS() /home/muf/sources/Indigo/third_party/googletest/include/gtest/gtest.h:2293
    #20 0x5643d59a6351 in main /home/muf/sources/Indigo/api/c/tests/unit/main.cpp:6
    #21 0x7fb35683a082 in __libc_start_main ../csu/libc-start.c:308