Do not use the SSE2 flag on MinGW (which was used to circumvent an earlier GCC version bug), as it leads to crashes inside Bullet on GCC 4.9.1.

Source/CMake/Modules/Urho3D-CMake-common.cmake

@@ -267,15 +267,8 @@ else ()
                 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
                 set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
                 if (URHO3D_SSE)
-                    if (NOT WIN32)
-                        set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse")
-                        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse")
-                    else ()
-                        message (STATUS "Using SSE2 instead of SSE because SSE fails on some Windows ports of GCC")
-                        message (STATUS "Disable SSE with the CMake option -DURHO3D_SSE=0 if this is not desired")
-                        set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse2")
-                        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse2")
-                    endif ()
+                    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse")
+                    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse")
                 endif ()
             endif ()
         endif ()