Summary: When there are more than 32768 SLOC in a file, spcomp underflows when storing debug info. These are safe to change as the file-backed struct uses uint32_t already.
Test Plan: Compiled the test plugin from bug 5959. I didn't load it, but it compiled without error and the SMX file is valid.
Reviewers: BAILOPAN
Differential Revision: https://phabricator.alliedmods.net/D2
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extra : rebase_source : fa907333b8c0dcab6e78c69ad4a92cdfb048083f
extra : amend_source : c7d2ec7d8b880459a57e4b2df5c1e8bbab5585bb