12a2785c7e86f586a05cad9ff90ce673c68c3115 only turned on MSVC noreturn for
external DLL XS modules, not inside the interp (perl5**.dll). This commit
fixes that. For me (bulk88), with an -O1 build, perl517.dll dropped
from 1044KB to 1036KB after applying this.
# define PERL_CALLCONV_NO_RET __declspec(dllimport) __declspec(noreturn)
# endif
# endif
+#else /* MSVC noreturn support inside the interp */
+# ifdef _MSC_VER
+# define PERL_CALLCONV_NO_RET __declspec(noreturn)
+# endif
#endif
#define WIN32_LEAN_AND_MEAN