Don't reset the last buffer state if we can't find it #136
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Defining this function at top level makes it easier to attach the debugger or override the definiton.
`old-selected-window` may return a frame instead of a window, or `nil` if there is not a previous window selection (e.g. at Emacs startup). In either of these cases, trying to find the old buffer and reset its state would produce an error, so do nothing instead.
ttuegel
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This pull request makes two changes:
boon-reset-state-for-switchwto the top level. This makes it easier to attach the debugger or override the definition.nil(e.g. at Emacs startup). Or, we might be given a frame instead of a window.