Fix 32 bit windows export crash

Created by: mrezai

Fixes #2189 (closed) and #1868 (closed). I don't know these build warnings were related to this issue or not but after change -O3 compiler option to -O2 they gone: scene/libscene.windows.opt.32.a(shader_graph.windows.opt.32.o): duplicate section .data$_ZZN4Math9fast_ftoiEfE1b[__ZZN4Math9fast_ftoiEfE1b]' has different size servers/libservers.windows.opt.32.a(audio_mixer_sw.windows.opt.32.o): duplicate section .data$_ZZN4Math9fast_ftoiEfE1b[__ZZN4Math9fast_ftoiEfE1b]' has different size and 32 bit release Windows export doesn't crash anymore. Built on ubuntu 14.04 64 bit and tested on windows 7 64 bit.