fix build on ppc when long double == double
fix build on ppc when long double == double

davibe/libffi,davibe/libffi,trejkaz/jna,rth7680/libffi,biosbits/libffi,trejkaz/jna,biosbits/libffi,davibe/libffi,nmav/libffi,Distrotech/libffi,zwaldowski/libffi-iOS,rth7680/libffi,nmav/libffi,davibe/libffi,alex/libffi,joshtriplett/libffi,bgarrels/libffi,s1341/libffi,s1341/libffi,trejkaz/jna,johne53/MB3Libffi,joshtriplett/libffi,johne53/MB3Libffi,joshtriplett/libffi,zwaldowski/libffi-iOS,s1341/libffi,Pan7/libffi,biosbits/libffi,joshtriplett/libffi,rth7680/libffi,zwaldowski/libffi-iOS,johne53/MB3Libffi,Distrotech/libffi,s1341/libffi,rth7680/libffi,Distrotech/libffi,bgarrels/libffi,zwaldowski/libffi-iOS,alex/libffi,alex/libffi,plicease/libffi,zwaldowski/libffi-iOS,biosbits/libffi,bgarrels/libffi,trejkaz/jna,nmav/libffi,alex/libffi,johne53/MB3Libffi,plicease/libffi,trejkaz/jna,Pan7/libffi,nmav/libffi,Pan7/libffi,Pan7/libffi,plicease/libffi,johne53/MB3Libffi,Distrotech/libffi,trejkaz/jna,bgarrels/libffi,plicease/libffi