py, compiler: Clean up and compress scope/compile structures.

Convert int types to uint where sensible, and then to uint8_t or
uint16_t where possible to reduce RAM usage.

1 files changed, 1 insertions, 0 deletions

diff --git a/py/emitbc.c b/py/emitbc.c
index 50bb0016e..b2edc25e0 100644
--- a/py/emitbc.c
+++ b/py/emitbc.c
@@ -321,6 +321,7 @@ STATIC void emit_bc_delete_id(emit_t *emit, qstr qstr) {
 }
 
 STATIC void emit_bc_pre(emit_t *emit, int stack_size_delta) {
+    assert((int)emit->stack_size + stack_size_delta >= 0);
     emit->stack_size += stack_size_delta;
     if (emit->stack_size > emit->scope->stack_size) {
         emit->scope->stack_size = emit->stack_size;