D11524: lldb: don't issue command when there's no env variables to set, fix Bug 391897

[Aetf]

qi437103 created this revision.
qi437103 added a reviewer: apol.
Restricted Application added a subscriber: kdevelop-devel.
qi437103 requested review of this revision.

REVISION SUMMARY
  LLDB becomes stricter about the `settings set target.env-vars`
  command. Now it doens't allow empty arguments. This causes a warning
  when start debugging session in KDevelop.

TEST PLAN
  - Created a new project with an empty environment variable profile
  - Start debugging with lldb
  - No warnings

REPOSITORY
  R32 KDevelop

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D11524

AFFECTED FILES
  plugins/lldb/debugsession.cpp

To: qi437103, apol
Cc: kdevelop-devel
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