SWDEV-337776 - Fix hipStreamEndCapture API

- Return hipErrorInvalidValue when pGraph is nullptr

Change-Id: I8846f4448eb15117f98421632885330f132c4fce


[ROCm/clr commit: e2874d5e22]

projects/clr/hipamd/src/hip_graph.cpp

@@ -775,7 +775,10 @@ hipError_t hipStreamBeginCapture(hipStream_t stream, hipStreamCaptureMode mode)
 
 hipError_t hipStreamEndCapture(hipStream_t stream, hipGraph_t* pGraph) {
   HIP_INIT_API(hipStreamEndCapture, stream, pGraph);
-  if (pGraph == nullptr || stream == nullptr) {
+  if (pGraph == nullptr) {
+    HIP_RETURN(hipErrorInvalidValue);
+  }
+  if (stream == nullptr) {
     HIP_RETURN(hipErrorIllegalState);
   }
   if (!hip::isValid(stream)) {