[dxvk] Data buffer can now be created uninitialized

src/dxvk/dxvk_data.cpp

@@ -7,6 +7,11 @@ namespace dxvk {
   DxvkDataBuffer:: DxvkDataBuffer() { }
   DxvkDataBuffer::~DxvkDataBuffer() { }
   
+  DxvkDataBuffer::DxvkDataBuffer(
+          size_t  size) {
+    m_data.resize(size);
+  }
+  
   DxvkDataBuffer::DxvkDataBuffer(
     const void*   data,
           size_t  size) {

src/dxvk/dxvk_data.h

@@ -16,6 +16,8 @@ namespace dxvk {
   public:
     
     DxvkDataBuffer();
+    DxvkDataBuffer(
+            size_t  size);
     DxvkDataBuffer(
       const void*   data,
             size_t  size);