Extension string check is broken

[wenq1]

Code below doesn't work for the OGLES extension string supplied.

                std::string extensions(reinterpret_cast<const char*>(extensionPtr));

                std::istringstream extensionStringStream(extensions);

                for (std::string extension; extensionStringStream >> extensions;)
                {
                    if (extension == "GL_OES_texture_npot")
                    {
                        npotTexturesSupported = true;
                    }

                    Log(Log::Level::INFO) << "npotTexturesSupported: " << npotTexturesSupported;

                }

GL_AMD_compressed_ATC_texture GL_AMD_performance_monitor GL_AMD_program_binary_Z400 GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_robustness GL_EXT_texture_format_BGRA8888 GL_EXT_texture_type_2_10_10_10_REV GL_NV_fence GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture GL_OES_depth24 GL_OES_EGL_image GL_OES_EGL_sync GL_OES_EGL_image_external GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_fragment_precision_high GL_OES_get_program_binary GL_OES_packed_depth_stencil GL_OES_depth_texture_cube_map GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_OES_vertex_type_10_10_10_2 GL_OES_vertex_array_object GL_QCOM_alpha_test GL_QCOM_binning_control GL_QCOM_driver_control GL_QCOM_perfmon_global_mode GL_QCOM_extended_get GL_QCOM_extended_get2 GL_QCOM_tiled_rendering GL_QCOM_writeonly_rendering GL_EXT_sRGB GL_EXT_sRGB_write_c

[wenq1]

The same check should potentially be extended to GL_OES_mapbuffer to dynamically check the functions availability.

[elnormous]

Fixed the extension check in https://github.com/elnormous/ouzel/commit/0476f19a75373bf9749bb7869b7b00dfcab06933