Cleanup: use new BLI_assert_unreachable macro

source/blender/python/gpu/gpu_py_matrix.c

@@ -201,7 +201,7 @@ static PyObject *pygpu_matrix_stack_context_enter(BPyGPU_MatrixStackContext *sel
     self->level = GPU_matrix_stack_level_get_projection();
   }
   else {
-    BLI_assert(0);
+    BLI_assert_unreachable();
   }
   Py_RETURN_NONE;
 }
@@ -234,7 +234,7 @@ static PyObject *pygpu_matrix_stack_context_exit(BPyGPU_MatrixStackContext *self
     }
   }
   else {
-    BLI_assert(0);
+    BLI_assert_unreachable();
   }
 finally:
   Py_RETURN_NONE;

source/blender/python/gpu/gpu_py_vertex_buffer.c

@@ -70,7 +70,8 @@
       break; \
     } \
     default: \
-      BLI_assert(0); \
+      BLI_assert_unreachable(); \
+      break; \
   } \
   ((void)0)