gh-106267: Add type cast to generated code (#106289)

Author: Eclips4

Python/executor_cases.c.h

@@ -520,7 +520,7 @@ def write_body(
                     f"{typ}{ceffect.name} = {func}(&next_instr[{active.offset}].cache);"
                 )
             else:
-                out.emit(f"{typ}{ceffect.name} = operand;")
+                out.emit(f"{typ}{ceffect.name} = ({typ.strip()})operand;")
 
         # Write the body, substituting a goto for ERROR_IF() and other stuff
         assert dedent <= 0