In interactive calls, suppress out-of-bound errors #303
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When viewing a PDF, calling
pdf-view-next-pageorpdf-view-previous-pagethrows an error if those commands are called at the end or beginning of a document, respectively. I think this behavior is not desired: it is very common to invoke these commands repeatedly to navigate to the beginning or end of a document, and it is mildly annoying to see a backtrace pop up (whendebug-on-erroris enabled) just because one invoked the command one more time than strictly necessary. This PR suppresses the error message in these cases.