Fix compilation error for win32.

That static align trick i've wrote about is still necessary.

source/blender/ikplugin/CMakeLists.txt

@@ -57,4 +57,8 @@ if(WITH_IK_ITASC)
 	)
 endif()
 
+if(WIN32)
+	add_definitions(-DEIGEN_DONT_ALIGN_STATICALLY)
+endif()
+
 blender_add_lib(bf_ikplugin "${SRC}" "${INC}" "${INC_SYS}")

source/blender/ikplugin/SConscript

@@ -8,4 +8,7 @@ incs += ' ../blenkernel ../include ../ikplugin #/intern/itasc #/extern/Eigen3'
 
 defs.append('WITH_IK_ITASC')
 
+if env['PLATFORM'] == 'win32':
+    defs.append('EIGEN_DONT_ALIGN_STATICALLY')
+
 env.BlenderLib ( 'bf_ikplugin', sources, Split(incs), defs, libtype=['core','player'], priority=[180, 190] )