sfm: disable min/max macros under win32

[sergiud]

Using Visual Studio 2017, I observe in the sfm module errors such as

opencv_contrib\modules\sfm\src\libmv_light\libmv/correspondence/matches.h(234): error C2589: '(': illegal token on right side of '::'

caused by min/max being defined as macros. This PR adds the NOMINMAX define to the sfm module to avoid the macro definitions.

Pull Request Readiness Checklist

• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on a code under GPL or other license that is incompatible with OpenCV
• The PR is proposed to proper branch
• There is reference to original bug report and related work
• There is accuracy test, performance test and test data in opencv_extra repository, if applicable
  Patch to opencv_extra has the same branch name.
• The feature is well documented and sample code can be built with the project CMake

[alalek]

Thank you 👍