[3.15] GH-149501: Fix compilation warning in _YIELD_VALUE uop (GH-149502) (#149737)

GH-149501: Fix compilation warning in `_YIELD_VALUE` uop (GH-149502)
(cherry picked from commit 1a79fd0)

Co-authored-by: Sergey Miryanov <sergey.miryanov@gmail.com>

Author: miss-islington

Modules/_testinternalcapi/test_cases.c.h

@@ -1867,8 +1867,9 @@ dummy_func(
             assert(INLINE_CACHE_ENTRIES_SEND == INLINE_CACHE_ENTRIES_FOR_ITER);
             #if TIER_ONE && defined(Py_DEBUG)
             if (!PyStackRef_IsNone(frame->f_executable)) {
-                int i = frame->instr_ptr - _PyFrame_GetBytecode(frame);
-                int opcode = _Py_GetBaseCodeUnit(_PyFrame_GetCode(frame), i).op.code;
+                Py_ssize_t i = frame->instr_ptr - _PyFrame_GetBytecode(frame);
+                assert(i >= 0 && i <= INT_MAX);
+                int opcode = _Py_GetBaseCodeUnit(_PyFrame_GetCode(frame), (int)i).op.code;
                 assert(opcode == SEND || opcode == FOR_ITER);
             }
             #endif