sfm: Fix unknown uint type error in mingw

uint is defined in sys/types.h in Linux for compatibility.
But it is not defined in Win32 platform. This fixes the following error:

opencv_contrib/modules/sfm/src/libmv_light/libmv/multiview/robust_estimation.h:59:8: error: 'uint' does not name a type; did you mean 'int'?
   59 | static uint IterationsRequired(int min_samples,
      |        ^~~~
      |        int

Author: Biswa96

modules/sfm/src/libmv_light/libmv/multiview/robust_estimation.h

@@ -54,10 +54,10 @@ class MLEScorer {
   double threshold_;
 };
 
-static uint IterationsRequired(int min_samples,
+static unsigned int IterationsRequired(int min_samples,
                         double outliers_probability,
                         double inlier_ratio) {
-  return static_cast<uint>(
+  return static_cast<unsigned int>(
       log(outliers_probability) / log(1.0 - pow(inlier_ratio, min_samples)));
 }