Fixed problem with compilation without HAVE_OPENCL

When compiling without OpenCL, some classes from its namespace are still used in code.

modules/core/src/umatrix.cpp

@@ -88,8 +88,10 @@ void UMatData::unlock()
 
 MatAllocator* UMat::getStdAllocator()
 {
+#ifdef HAVE_OPENCL
     if( ocl::haveOpenCL() && ocl::useOpenCL() )
         return ocl::getOpenCLAllocator();
+#endif
     return Mat::getStdAllocator();
 }
 
@@ -666,6 +668,8 @@ void UMat::copyTo(OutputArray _dst, InputArray _mask) const
         return;
     }
     
+#ifdef HAVE_OPENCL
+
     int cn = channels(), mtype = _mask.type(), mdepth = CV_MAT_DEPTH(mtype), mcn = CV_MAT_CN(mtype);
     CV_Assert( mdepth == CV_8U && (mcn == 1 || mcn == cn) );
 
@@ -692,6 +696,7 @@ void UMat::copyTo(OutputArray _dst, InputArray _mask) const
                 return;
         }
     }
+#endif
 
     Mat src = getMat(ACCESS_READ);
     src.copyTo(_dst, _mask);
@@ -714,6 +719,8 @@ void UMat::convertTo(OutputArray _dst, int _type, double alpha, double beta) con
         return;
     }
     
+#ifdef HAVE_OPENCL
+    
     bool doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
     bool needDouble = sdepth == CV_64F || ddepth == CV_64F;
     if( dims <= 2 && cn && _dst.isUMat() && ocl::useOpenCL() &&
@@ -748,6 +755,7 @@ void UMat::convertTo(OutputArray _dst, int _type, double alpha, double beta) con
                 return;
         }
     }
+#endif
 
     Mat m = getMat(ACCESS_READ);
     m.convertTo(_dst, _type, alpha, beta);
@@ -756,7 +764,10 @@ void UMat::convertTo(OutputArray _dst, int _type, double alpha, double beta) con
 UMat& UMat::setTo(InputArray _value, InputArray _mask)
 {
     bool haveMask = !_mask.empty();
+    
+#ifdef HAVE_OPENCL
     int tp = type(), cn = CV_MAT_CN(tp);
+
     if( dims <= 2 && cn <= 4 && CV_MAT_DEPTH(tp) < CV_64F && ocl::useOpenCL() )
     {
         Mat value = _value.getMat();
@@ -795,6 +806,8 @@ UMat& UMat::setTo(InputArray _value, InputArray _mask)
                 return *this;
         }
     }
+#endif
+
     Mat m = getMat(haveMask ? ACCESS_RW : ACCESS_WRITE);
     m.setTo(_value, _mask);
     return *this;