Avoid using 1<<31 for ImGuiWindowFlags_NavFlattened as it seems to confuse some binding generators.

Author: ocornut

imgui.h

@@ -1099,8 +1099,8 @@ enum ImGuiWindowFlags_
 
     // Obsolete names
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    ImGuiWindowFlags_NavFlattened           = 1 << 29,  // Obsoleted in 1.90.9: Use ImGuiChildFlags_NavFlattened in BeginChild() call.
     ImGuiWindowFlags_AlwaysUseWindowPadding = 1 << 30,  // Obsoleted in 1.90.0: Use ImGuiChildFlags_AlwaysUseWindowPadding in BeginChild() call.
-    ImGuiWindowFlags_NavFlattened           = 1 << 31,  // Obsoleted in 1.90.9: Use ImGuiChildFlags_NavFlattened in BeginChild() call.
 #endif
 };