failure to detect format of `double' on MS-Windows

[Torbjörn Granlund]

Vincent Lefevre <vincent at vinc17.net> writes:

  $ ./configure '--host=i586-mingw32msvc' '--disable-shared' 'host_alias=i586-mingw32msvc'
  [...]
  checking format of `double' floating point... od: conftest: No such file or directory
  od: conftest: No such file or directory
  unknown 
  configure: WARNING: Could not determine float format.
  configure: WARNING: Conversions to and from "double" may be slow.
  [...]

  One needs to change "conftest" to "conftest$EXEEXT".
  Patch attached.

Thanks Vincent, now committed.

-- 
Torbjörn
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