v3.1.x: btl-portals4: don't free module resources when proc count goes to zero #5065
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This PR fixes a segfault in btl-portals4 add_procs(). The segfault
occurs if add_procs() is called after a del_procs() call that reduces
the proc count to zero which would cause PT and NI resources to be
freed. This commit resolves the segfault by using a common
initiailization boolean and only freeing module resources in
finalize().
Reported in #4801.
Signed-off-by: Todd Kordenbrock (thkgcode@gmail.com)
(cherry picked from commit b569633)