changed kernel.set to support unsuccssful set

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

@@ -599,17 +599,6 @@ protected:
 
 CV_EXPORTS MatAllocator* getOpenCLAllocator();
 
-#define SAFE_KERNEL_SET_ARG(idx, arg) \
-{\
-    int idxNew = kernel.set(idx, arg); \
-if (-1 == idxNew)\
-{\
-    printf("algorithm can't setup argument index = %d to kernel\n", idx); \
-    return false; \
-}\
-    idx = idxNew; \
-}
-
 }}
 
 #endif

modules/core/src/ocl.cpp

@@ -2796,7 +2796,8 @@ int Kernel::set(int i, const void* value, size_t sz)
 {
     if (!p || !p->handle)
         return -1;
-    CV_Assert(i >= 0);
+    if (i < 0)
+        return i;
     if( i == 0 )
         p->cleanupUMats();
 
@@ -2822,7 +2823,8 @@ int Kernel::set(int i, const KernelArg& arg)
 {
     if( !p || !p->handle )
         return -1;
-    CV_Assert( i >= 0 );
+    if (i < 0)
+        return i;
     if( i == 0 )
         p->cleanupUMats();
     if( arg.m )