Fix a bug when pushing pointers of arguments into std::vector.

When argument pointers pushed into an vector and the pointers point to
address on stack, we need to make sure they are valid until kernels are
successfully flushed onto the queue.

modules/ocl/src/arithm.cpp

@@ -413,11 +413,11 @@ static void arithmetic_scalar_run(const oclMat &src, oclMat &dst, string kernelN
     args.push_back( make_pair( sizeof(cl_int), (void *)&cols ));
     args.push_back( make_pair( sizeof(cl_int), (void *)&dst_step1 ));
 
+    float f_scalar = (float)scalar;
     if(src.clCxt->supportsFeature(Context::CL_DOUBLE))
         args.push_back( make_pair( sizeof(cl_double), (void *)&scalar ));
     else
     {
-        float f_scalar = (float)scalar;
         args.push_back( make_pair( sizeof(cl_float), (void *)&f_scalar));
     }
 
@@ -1687,10 +1687,11 @@ void bitwise_run(const oclMat &src1, const oclMat &src2, oclMat &dst, string ker
     args.push_back( make_pair( sizeof(cl_int), (void *)&cols ));
     args.push_back( make_pair( sizeof(cl_int), (void *)&dst_step1 ));
 
+    T scalar;
     if(_scalar != NULL)
     {
         double scalar1 = *((double *)_scalar);
-        T scalar = (T)scalar1;
+        scalar = (T)scalar1;
         args.push_back( make_pair( sizeof(T), (void *)&scalar ));
     }
 
@@ -2307,9 +2308,9 @@ static void arithmetic_pow_run(const oclMat &src1, double p, oclMat &dst, string
     args.push_back( make_pair( sizeof(cl_int), (void *)&dst.rows ));
     args.push_back( make_pair( sizeof(cl_int), (void *)&cols ));
     args.push_back( make_pair( sizeof(cl_int), (void *)&dst_step1 ));
+    float pf = p;
     if(!src1.clCxt->supportsFeature(Context::CL_DOUBLE))
     {
-        float pf = p;
         args.push_back( make_pair( sizeof(cl_float), (void *)&pf ));
     }
     else

modules/ocl/src/imgproc.cpp

@@ -269,7 +269,7 @@ namespace cv
             size_t globalThreads[3] = {glbSizeX, glbSizeY, 1};
             size_t localThreads[3] = {blkSizeX, blkSizeY, 1};
 
-
+            float borderFloat[4] = {(float)borderValue[0], (float)borderValue[1], (float)borderValue[2], (float)borderValue[3]};
             vector< pair<size_t, const void *> > args;
             if(map1.channels() == 2)
             {
@@ -289,9 +289,8 @@ namespace cv
                 args.push_back( make_pair(sizeof(cl_int), (void *)&map1.cols));
                 args.push_back( make_pair(sizeof(cl_int), (void *)&map1.rows));
                 args.push_back( make_pair(sizeof(cl_int), (void *)&cols));
-                float borderFloat[4] = {(float)borderValue[0], (float)borderValue[1], (float)borderValue[2], (float)borderValue[3]};
                 
-               if(src.clCxt->supportsFeature(Context::CL_DOUBLE))
+                if(src.clCxt->supportsFeature(Context::CL_DOUBLE))
                 {
                     args.push_back( make_pair(sizeof(cl_double4), (void *)&borderValue));
                 }
@@ -325,7 +324,6 @@ namespace cv
                 }
                 else
                 {
-                    float borderFloat[4] = {(float)borderValue[0], (float)borderValue[1], (float)borderValue[2], (float)borderValue[3]};
                     args.push_back( make_pair(sizeof(cl_float4), (void *)&borderFloat));
                 }
             }