media-libs/opencv/files/opencv-2.3.0-local-iota.patch

Fix clang errors due to ambiguous call to 'iota' (https://crbug.com/801269).
'iota' is defined in 'stl_numeric.h', as well as locally in spinimages.cpp.
Rename the local version, so it does not conflict with the standard library.
Upstream already has the equivalent of this patch as commit
https://github.com/opencv/opencv/commit/ec8637a9902e378b83cdbae901cab27b15804770
which first appeared in OpenCV-2.4.5.

--- OpenCV-2.3.0/modules/contrib/src/spinimages.cpp
+++ OpenCV-2.3.0/modules/contrib/src/spinimages.cpp
@@ -85,7 +85,7 @@ namespace
     };
     size_t colors_mum = sizeof(colors)/sizeof(colors[0]);
 
-template<class FwIt, class T> void iota(FwIt first, FwIt last, T value) { while(first != last) *first++ = value++; }
+template<class FwIt, class T> void _iota(FwIt first, FwIt last, T value) { while(first != last) *first++ = value++; }
 
 void computeNormals( const Octree& Octree, const vector<Point3f>& centers, vector<Point3f>& normals, 
                     vector<uchar>& mask, float normalRadius, int minNeighbors = 20)
@@ -790,14 +790,14 @@ void cv::SpinImageModel::selectRandomSubset(float ratio)
     else if (setSize == vtxSize)
     {
         subset.resize(vtxSize);
-        iota(subset.begin(), subset.end(), 0);
+        _iota(subset.begin(), subset.end(), 0);
     }
     else
     {
         RNG& rnd = theRNG();
 
         vector<size_t> left(vtxSize);
-        iota(left.begin(), left.end(), (size_t)0);
+        _iota(left.begin(), left.end(), (size_t)0);
 
         subset.resize(setSize);
         for(size_t i = 0; i < setSize; ++i)
@@ -870,7 +870,7 @@ void cv::SpinImageModel::compute()
     {
         mesh.computeNormals(normalRadius, minNeighbors);
         subset.resize(mesh.vtx.size());
-        iota(subset.begin(), subset.end(), 0);
+        _iota(subset.begin(), subset.end(), 0);
     }
     else
         mesh.computeNormals(subset, normalRadius, minNeighbors);