[dxvk] Flush initialization context unconditionally

An application might need to wait for a resource to become available
just after it has been created, in which case  its initialization
commands might not have been dispatched yet. If no rendering commands
were issued on the immediate context prior to the wait operation,
WaitForResource would stall indefinitely.

src/d3d11/d3d11_context_imm.cpp

@@ -42,8 +42,9 @@ namespace dxvk {
   
   
   void STDMETHODCALLTYPE D3D11ImmediateContext::Flush() {
+    m_parent->FlushInitContext();
+    
     if (m_csChunk->commandCount() != 0) {
-      m_parent->FlushInitContext();
       m_drawCount = 0;
       
       // Add commands to flush the threaded