wined3d: Reference the source/destination bo in wined3d_context_gl_copy_bo_address().

dlls/wined3d/context_gl.c

@@ -2728,6 +2728,9 @@ void wined3d_context_gl_copy_bo_address(struct wined3d_context_gl *context_gl,
             GL_EXTCALL(glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
                     (GLintptr)src->addr, (GLintptr)dst->addr, size));
             checkGLcall("direct buffer copy");
+
+            wined3d_context_gl_reference_bo(context_gl, src_bo);
+            wined3d_context_gl_reference_bo(context_gl, dst_bo);
         }
         else
         {
@@ -2747,12 +2750,16 @@ void wined3d_context_gl_copy_bo_address(struct wined3d_context_gl *context_gl,
         wined3d_context_gl_bind_bo(context_gl, src_bo->binding, src_bo->id);
         GL_EXTCALL(glGetBufferSubData(src_bo->binding, (GLintptr)src->addr, size, dst->addr));
         checkGLcall("buffer download");
+
+        wined3d_context_gl_reference_bo(context_gl, src_bo);
     }
     else if (dst_bo && !src_bo)
     {
         wined3d_context_gl_bind_bo(context_gl, dst_bo->binding, dst_bo->id);
         GL_EXTCALL(glBufferSubData(dst_bo->binding, (GLintptr)dst->addr, size, src->addr));
         checkGLcall("buffer upload");
+
+        wined3d_context_gl_reference_bo(context_gl, dst_bo);
     }
     else
     {