Repair binary compatibility of ocl module

modules/ocl/include/opencv2/ocl/ocl.hpp

@@ -487,10 +487,11 @@ namespace cv
         CV_EXPORTS void bitwise_xor(const oclMat &src1, const Scalar &s, oclMat &dst, const oclMat &mask = oclMat());
 
         //! Logical operators
-        CV_EXPORTS oclMatExpr operator ~ (const oclMat &src);
-        CV_EXPORTS oclMatExpr operator | (const oclMat &src1, const oclMat &src2);
-        CV_EXPORTS oclMatExpr operator & (const oclMat &src1, const oclMat &src2);
-        CV_EXPORTS oclMatExpr operator ^ (const oclMat &src1, const oclMat &src2);
+        CV_EXPORTS oclMat operator ~ (const oclMat &);
+        CV_EXPORTS oclMat operator | (const oclMat &, const oclMat &);
+        CV_EXPORTS oclMat operator & (const oclMat &, const oclMat &);
+        CV_EXPORTS oclMat operator ^ (const oclMat &, const oclMat &);
+
 
         //! Mathematics operators
         CV_EXPORTS oclMatExpr operator + (const oclMat &src1, const oclMat &src2);

modules/ocl/src/arithm.cpp

@@ -2125,22 +2125,22 @@ void cv::ocl::bitwise_xor(const oclMat &src1, const Scalar &src2, oclMat &dst, c
         bitwise_scalar( src1, src2, dst, mask, kernelName, &arithm_bitwise_xor_scalar);
 }
 
-oclMatExpr cv::ocl::operator ~ (const oclMat &src)
+oclMat cv::ocl::operator ~ (const oclMat &src)
 {
     return oclMatExpr(src, oclMat(), MAT_NOT);
 }
 
-oclMatExpr cv::ocl::operator | (const oclMat &src1, const oclMat &src2)
+oclMat cv::ocl::operator | (const oclMat &src1, const oclMat &src2)
 {
     return oclMatExpr(src1, src2, MAT_OR);
 }
 
-oclMatExpr cv::ocl::operator & (const oclMat &src1, const oclMat &src2)
+oclMat cv::ocl::operator & (const oclMat &src1, const oclMat &src2)
 {
     return oclMatExpr(src1, src2, MAT_AND);
 }
 
-oclMatExpr cv::ocl::operator ^ (const oclMat &src1, const oclMat &src2)
+oclMat cv::ocl::operator ^ (const oclMat &src1, const oclMat &src2)
 {
     return oclMatExpr(src1, src2, MAT_XOR);
 }