perf tools: Make alias handler to check return value of strbuf
Make alias handler and sq_quote_argv to check the return value of strbuf APIs. In sq_quote_argv() calls die(), but this fix handles strbuf failure as a special case and returns to caller, since the caller - handle_alias() also has to check the return value of other strbuf APIs and those checks can be merged to one if() statement. Signed-off-by: NMasami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160510054725.6158.84597.stgit@devboxSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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