bugfix [#24518] Blender wont compile with -Wall -Werror and COLLADA support

fix included in report from Martijn Berger (mberger)
made some small changes.

- use ints rather then unsigned long for printing, values are not likely to be very large.
- CMake remove strict flags from collada build dir since I had warnings in the collada headers.
- added xml2 to collada libraries else I couldnt get collada building.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/collada/DocumentExporter.cpp b/source/blender/collada/DocumentExporter.cpp
index 9062bd4ba9f..66a0b0cbdd4 100644
--- a/source/blender/collada/DocumentExporter.cpp
+++ b/source/blender/collada/DocumentExporter.cpp
@@ -904,7 +904,7 @@ protected:
 void DocumentExporter::exportCurrentScene(Scene *sce, const char* filename)
 {
 	PointerRNA sceneptr, unit_settings;
-	PropertyRNA *system, *scale;
+	PropertyRNA *system; /* unused , *scale; */
 
 	clear_global_id_map();