Fix SAL_CALL placement (so MinGW won't complain)

[Tor Lillqvist]

Unfortunately now then MSVC complains...

C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(48)
: error C2059: syntax error : '('
C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(48)
: error C2238: unexpected token(s) preceding ';'
C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(53)
: error C2059: syntax error : '('
C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(53)
: error C2238: unexpected token(s) preceding ';'
C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(58)
: error C2059: syntax error : '('
C:\ooo\git\master\core\solver\wntmsci12\inc\cppuhelper/implementationentry.hxx(62)
: error C2238: unexpected token(s) preceding ';'

--tml