Make sure bool will always have the same size in C and C++

There were an issues with data structures defined in headers
and being used by both C and C++ on systems with stdbool
unavailable.

This happened because bool in this case will be defined as
unsigned int, which is 4 bytes. But C++'s bool is only 1
byte and this lead to alignment issues.

Now bool is always 1 byte, also made sure there's no situation
like bool foo = BitField & BitFlag, which could give overflow
issues. Use (BitField & BitFlag) != 0 instead.

Fixes #35553: Compositor broken (Backdrop & Preview)

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c
index 6502346d88a..79dacaad2fa 100644
--- a/source/blender/bmesh/intern/bmesh_mesh.c
+++ b/source/blender/bmesh/intern/bmesh_mesh.c
@@ -573,7 +573,7 @@ void BM_mesh_elem_index_validate(BMesh *bm, const char *location, const char *fu
 	bool is_any_error = 0;
 
 	for (i = 0; i < 3; i++) {
-		const bool is_dirty = (flag_types[i] & bm->elem_index_dirty);
+		const bool is_dirty = (flag_types[i] & bm->elem_index_dirty) != 0;
 		int index = 0;
 		bool is_error = false;
 		int err_val = 0;