removing unreachible code

modules/imgproc/src/histogram.cpp

@@ -778,7 +778,7 @@ calcHist_( vector<uchar*>& _ptrs, const vector<int>& _deltas,
             calcHist1D_Invoker<T> body(_ptrs, _deltas, hist, _uniranges, size[0], dims, imsize);
             parallel_for(BlockedRange(0, imsize.height), body);
             return;
-#endif
+#else
             double a = uniranges[0], b = uniranges[1];
             int sz = size[0], d0 = deltas[0], step0 = deltas[1];
             const T* p0 = (const T*)ptrs[0];
@@ -801,6 +801,7 @@ calcHist_( vector<uchar*>& _ptrs, const vector<int>& _deltas,
                                 ((int*)H)[idx]++;
                         }
             }
+#endif //HAVE_TBB
         }
         else if( dims == 2 )
         {
@@ -808,7 +809,7 @@ calcHist_( vector<uchar*>& _ptrs, const vector<int>& _deltas,
             calcHist2D_Invoker<T> body(_ptrs, _deltas, hist, _uniranges, size, dims, imsize, hstep);
             parallel_for(BlockedRange(0, imsize.height), body);
             return;
-#endif
+#else
             double a0 = uniranges[0], b0 = uniranges[1], a1 = uniranges[2], b1 = uniranges[3];
             int sz0 = size[0], sz1 = size[1];
             int d0 = deltas[0], step0 = deltas[1],
@@ -837,6 +838,7 @@ calcHist_( vector<uchar*>& _ptrs, const vector<int>& _deltas,
                                 ((int*)(H + hstep0*idx0))[idx1]++;
                         }
             }
+#endif //HAVE_TBB
         }
         else if( dims == 3 )
         {