added IPP Sobel and Sharr filters. Also some minor changes.

modules/core/include/opencv2/core/mat.hpp

@@ -168,7 +168,7 @@ inline Mat::Mat(Size _sz, int _type, void* _data, size_t _step)
     dataend = datalimit - _step + minstep;
 }
 
-    
+
 inline Mat::Mat(const CvMat* m, bool copyData)
     : flags(MAGIC_VAL + (m->type & (CV_MAT_TYPE_MASK|CV_MAT_CONT_FLAG))),
     dims(2), rows(m->rows), cols(m->cols), data(m->data.ptr), refcount(0),

modules/core/src/arithm.cpp

@@ -268,6 +268,16 @@ typedef NoVec VXor8u;
 
 
 #if defined (HAVE_IPP) && (IPP_VERSION_MAJOR >= 7)
+struct IPPArithmInitializer
+{
+    IPPArithmInitializer(void)
+    {
+      IppStatus status = ippStaticInit();
+    }
+};
+
+IPPArithmInitializer ippArithmInitializer;
+
 struct ippAdd8u
 {
     int operator()(const Ipp8u* src1, const Ipp8u* src2, Ipp8u* dst, int len) const