"dir" crashing oactve 3.2.0/mingw32

[Benjamin Lindner]

Hello,

there have been some reports that simply calling "dir" crashes octave 
3.2.0/mingw32 on some windows platforms.
This has been tracked down to calls to strftime() failing with a "%T" 
format specifier.

Mingw uses the strftime function provided by microsoft C runtime 
library, and indeed msdn states that the following format specifiers are 
supported: aAbBcdHIjmMpSUwWxXyYzZ

Mind that "T" is not supported, neither is "e".

Don't ask me why MS does not simply ignore other format specifiers, but 
causes applications to crash. But changing "%T" to the equivalent 
"%H:%M:%S" fixes the crashes in "dir".
Since "e" is neither supported, I propose to change it to "d" (with "%e" 
being sprintf("%d",dayofmonth) and "%d" being sprintf("%02d",dayofmonth).

See the attached changeset.

It would be great to have this also fixed in 3.2.x

benjamin
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