Use PY_VERSION_HEX for a cleaner CVE-2008-5983 mode check.

Author: drmoose

include/pybind11/embed.h

@@ -152,9 +152,8 @@ inline void set_interpreter_argv(int argc, char** argv, bool add_current_dir_to_
     auto pysys_argv = safe_argv;
 #endif
 
-#if PY_MAJOR_VERSION == 2 && (PY_MINOR_VERSION < 6 || (PY_MINOR_VERSION == 6 && PY_MICRO_VERSION < 6)) || \
-    PY_MAJOR_VERSION == 3 && (PY_MINOR_VERSION < 1 || (PY_MINOR_VERSION == 1 && PY_MICRO_VERSION < 3))
-    // These python versions don't have PySys_SetArgvEx, so we have to use the workaround
+#if PY_VERSION_HEX < 0x020606f0 || (PY_MAJOR_VERSION == 3 && PY_VERSION_HEX < 0x030103f0
+    // These python versions don't have PySys_SetArgvEx, so we have to use the approach
     // recommended by https://docs.python.org/3.5/c-api/init.html#c.PySys_SetArgvEx
     // to work around CVE-2008-5983
     PySys_SetArgv(argc, pysys_argv);