Make parse_units() handle trailing whitespace

Skipping any trailing whitespace characters

lib/roken/parse_units.c

@@ -135,6 +135,8 @@ parse_something (const char *s, const struct units *units,
 	}
 	if (*p == 's')
 	    ++p;
+	while(isspace((unsigned char)*p))
+	    ++p;
     }
     return res;
 }