Fix NPE if ITextViewer is nullified during call to .underline() #914
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Previously, it was possible for the `viewer` variable used in `LSPDocumentLinkPresentationReconcilingStrategy.underline()` to be nullified externally, which caused a null-pointer exception for the call `viewer.getTextWidget()`. This commit solves this problem by saving the relevant viewer as a variable local to the `LSPDocumentLinkPresentationReconcilingStrategy.underline()` function.
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Previously, it was possible for the
viewervariable used inLSPDocumentLinkPresentationReconcilingStrategy.underline()to be nullified externally, which caused a null-pointer exception for the callviewer.getTextWidget().This commit solves this problem by saving the relevant viewer as a variable local to the
LSPDocumentLinkPresentationReconcilingStrategy.underline()function.