[Mingw-w64-public] Fix for problems with clang

Re-sending since SF seems to have eaten the first one. A while back snow_xmas reported a problem compiling mingw-w64 with clang. I made a change, but he disappeared before approving the fix. I have just had a clang expert take a look, and while he had some comments about the coding style, func

[Mingw-w64-public] gfortran, open mp and floating point precision

I wrote a test program in fortran and used gfortran 4.9.2(tdm64-gcc 4.9.2) with openmp to make me familiar with parallel processing. Theprogram does matrix inversion. I tested for different floating point precisions. For single, double and quadruple floating point precisioneverything seem