Call _wputenv_s() also in ZTS builds

This has not been done because `_wputenv_s()` is not thread-safe.
However, there is now an environment mutex in place, so that should no
longer be an issue.

Author: cmb69

ext/standard/basic_functions.c

@@ -918,14 +918,11 @@ PHP_FUNCTION(putenv)
 	error_code = SetEnvironmentVariableW(keyw, valw);
 
 	if (error_code != 0
-# ifndef ZTS
-	/* We need both SetEnvironmentVariable and _putenv here as some
+		/* We need both SetEnvironmentVariable and _putenv here as some
 		dependency lib could use either way to read the environment.
 		Obviously the CRT version will be useful more often. But
-		generally, doing both brings us on the safe track at least
-		in NTS build. */
-	&& _wputenv_s(keyw, valw ? valw : L"") == 0
-# endif
+		generally, doing both brings us on the safe track. */
+		&& _wputenv_s(keyw, valw ? valw : L"") == 0
 	) { /* success */
 # endif
 #endif