Fix #898. Two approximate matches followed by an exact match

no longer cause an ambiguity to be reported.


[SVN r38187]

libs/program_options

@@ -1 +1 @@
-Subproject commit 4223d3231d434bdcaa476e7cf309213f54898008
+Subproject commit cd647f785a70b3e651981a9fb30107915636be32