CMakeLists: Add missing __init__.py to generator install (#841)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e57090..da32427 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,6 +67,7 @@
     endforeach()
 
     install( FILES generator/proto/_utils.py
+                   generator/proto/__init__.py
              DESTINATION ${PYTHON_INSTDIR}/proto/ )
 endif()