Remove usage of "lg" in printf format

Remove usage of "lg" in printf format

MinGW on Windows does not "lg". The reason is that MinGW mixes
GCC and the MSVC runtime. For GCC a long double is either
96-bit or 128-bit type for long double on x86 or x64 targets
(see http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html).
However, MSVC uses a 64-bit type
(see http://msdn.microsoft.com/en-us/library/9cx8xs15.aspx).
That means for MSVC "double" and "long double" are the same.

Because of this mismatch, the "l" in "lg", which is safely ignored
on Linux and BSD systems is not safely ignored in MSVC systems
where GCC is used to compile. This issue does not arise when using
VS compiler on Windows.