Commit e8f56cc4e0c5211d73a127076a2e7318655bde17
2019-04-05T11:37:49
enable -Wconversion and -Wsign-conversion on travis * no changes to the library code * conversion issues in the demo testsuite fixed * add CONV_WARNINGS and enable the warnings only for clang-7 (for now) * disable Wsystem-headers if Wconversion is enabled, to avoid warnings from the system headers