UPBGE: Optimize update of matrix in RAS_MeshSlot rendering.

Previously the test to apply/update or not the matrix was complex and made
only in RAS_MeshSlot even if the operand of the test were know at
RAS_DisplayArrayBucket level. To optimize this check we cached its value
in the display array node data in RAS_DisplayArrayBucket::UpdateActiveMeshSlots.

Test with 40*40 objects of 2 meshes:
Before: 2.20ms
After: 2.10ms (4.5%)

source/gameengine/Rasterizer/Node/RAS_RenderNode.h

@@ -71,6 +71,7 @@ struct RAS_MaterialNodeData
 struct RAS_DisplayArrayNodeData
 {
 	RAS_IStorageInfo *m_storageInfo;
+	bool m_applyMatrix;
 };
 
 struct RAS_MeshSlotNodeData

source/gameengine/Rasterizer/RAS_DisplayArrayBucket.cpp

@@ -210,6 +210,7 @@ void RAS_DisplayArrayBucket::UpdateActiveMeshSlots(RAS_Rasterizer *rasty)
 
 	// Update node data.
 	m_nodeData.m_storageInfo = m_storageInfo;
+	m_nodeData.m_applyMatrix = (!m_deformer || !m_deformer->SkipVertexTransform());
 }
 
 void RAS_DisplayArrayBucket::DestructStorageInfo()

source/gameengine/Rasterizer/RAS_MeshSlot.cpp

@@ -181,21 +181,22 @@ void RAS_MeshSlot::RunNode(const RAS_MeshSlotNodeTuple& tuple)
 
 	rasty->PushMatrix();
 
-	const bool istext = materialData->m_text;
-	if ((!m_pDeformer || !m_pDeformer->SkipVertexTransform()) && !istext) {
-		float mat[16];
-		rasty->GetTransform(m_meshUser->GetMatrix(), materialData->m_drawingMode, mat);
-		rasty->MultMatrix(mat);
-	}
-
-	if (istext) {
+	if (materialData->m_text) {
 		rasty->IndexPrimitivesText(this);
 	}
-	else if (m_pDerivedMesh) {
-		rasty->IndexPrimitivesDerivedMesh(this);
-	}
 	else {
-		rasty->IndexPrimitives(displayArrayData->m_storageInfo);
+		if (displayArrayData->m_applyMatrix) {
+			float mat[16];
+			rasty->GetTransform(m_meshUser->GetMatrix(), materialData->m_drawingMode, mat);
+			rasty->MultMatrix(mat);
+		}
+
+		if (m_pDerivedMesh) {
+			rasty->IndexPrimitivesDerivedMesh(this);
+		}
+		else {
+			rasty->IndexPrimitives(displayArrayData->m_storageInfo);
+		}
 	}
 
 	rasty->PopMatrix();