Fix for a crasher due to misaligned stack on x86-32.
Fix for a crasher due to misaligned stack on x86-32.

Full information on reproduction (using Python's ctypes available here: http://bugs.python.org/issue17423)
johne53/MB3Libffi,s1341/libffi,bgarrels/libffi,trejkaz/jna,joshtriplett/libffi,nmav/libffi,trejkaz/jna,trejkaz/jna,joshtriplett/libffi,Distrotech/libffi,davibe/libffi,plicease/libffi,zwaldowski/libffi-iOS,johne53/MB3Libffi,Distrotech/libffi,nmav/libffi,rth7680/libffi,biosbits/libffi,davibe/libffi,s1341/libffi,plicease/libffi,rth7680/libffi,bgarrels/libffi,trejkaz/jna,davibe/libffi,biosbits/libffi,s1341/libffi,trejkaz/jna,joshtriplett/libffi,zwaldowski/libffi-iOS,zwaldowski/libffi-iOS,rth7680/libffi,Distrotech/libffi,biosbits/libffi,bgarrels/libffi,Pan7/libffi,s1341/libffi,joshtriplett/libffi,zwaldowski/libffi-iOS,trejkaz/jna,johne53/MB3Libffi,Pan7/libffi,nmav/libffi,plicease/libffi,johne53/MB3Libffi,Distrotech/libffi,Pan7/libffi,Pan7/libffi,davibe/libffi,nmav/libffi,bgarrels/libffi,biosbits/libffi,zwaldowski/libffi-iOS,rth7680/libffi,plicease/libffi,johne53/MB3Libffi