Flags should be unsigned

Author: markshannon

Include/internal/pycore_opcode_metadata.h

@@ -286,8 +286,8 @@ def generate_metadata_table(analysis: Analysis, out: CWriter) -> None:
     table_size = 256 + len(analysis.pseudos)
     out.emit("struct opcode_metadata {\n")
     out.emit("uint8_t valid_entry;\n")
-    out.emit("int8_t instr_format;\n")
-    out.emit("int16_t flags;\n")
+    out.emit("uint8_t instr_format;\n")
+    out.emit("uint16_t flags;\n")
     out.emit("};\n\n")
     out.emit(
         f"extern const struct opcode_metadata _PyOpcode_opcode_metadata[{table_size}];\n"