IVGCVSW-4449 Add missing QLstm nullptr checks

* Adds missing nullptr checks for peephole bias for
  QLstm.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: Ib04c8352141977cc7ea11a4859f1b11d46472722

1 files changed, 6 insertions, 1 deletions

diff --git a/src/backends/backendsCommon/WorkloadFactory.cpp b/src/backends/backendsCommon/WorkloadFactory.cpp
index c55c70a1f7..34bfd7cead 100644
--- a/src/backends/backendsCommon/WorkloadFactory.cpp
+++ b/src/backends/backendsCommon/WorkloadFactory.cpp
@@ -795,7 +795,12 @@ bool IWorkloadFactory::IsLayerSupported(const BackendId& backendId,
             if(descriptor.m_ProjectionEnabled)
             {
                 paramsInfo.m_ProjectionWeights = &cLayer->m_ProjectionParameters.m_ProjectionWeights->GetTensorInfo();
-                paramsInfo.m_ProjectionBias = &cLayer->m_ProjectionParameters.m_ProjectionBias->GetTensorInfo();
+
+                // Projection bias is optional even if projection is enabled
+                if (cLayer->m_ProjectionParameters.m_ProjectionBias != nullptr)
+                {
+                    paramsInfo.m_ProjectionBias = &cLayer->m_ProjectionParameters.m_ProjectionBias->GetTensorInfo();
+                }
             }
 
             if(descriptor.m_PeepholeEnabled)