COMPMID-556 Add macro for checking graph's tensor object

Change-Id: I1de1c2932c9906b23b49e18bd82c173846d98723
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/93860
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/src/graph/nodes/ConvolutionLayer.cpp b/src/graph/nodes/ConvolutionLayer.cpp
index d3ab97f..a7236fc 100644
--- a/src/graph/nodes/ConvolutionLayer.cpp
+++ b/src/graph/nodes/ConvolutionLayer.cpp
@@ -23,6 +23,7 @@
  */
 #include "arm_compute/graph/nodes/ConvolutionLayer.h"
 
+#include "arm_compute/graph/Error.h"
 #include "arm_compute/runtime/CL/functions/CLConvolutionLayer.h"
 #include "arm_compute/runtime/CL/functions/CLDirectConvolutionLayer.h"
 #include "arm_compute/runtime/IFunction.h"
@@ -175,8 +176,7 @@
 
 std::unique_ptr<arm_compute::IFunction> ConvolutionLayer::instantiate_node(GraphContext &ctx, ITensorObject *input, ITensorObject *output)
 {
-    ARM_COMPUTE_ERROR_ON(input == nullptr || input->tensor() == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr || output->tensor() == nullptr);
+    ARM_COMPUTE_ERROR_ON_UNALLOCATED_TENSOR_OBJECT(input, output);
 
     arm_compute::ITensor *in  = input->tensor();
     arm_compute::ITensor *out = output->tensor();