Check if lang is NULL and use shorter check

Based on qontinuum-dev's original suggestion.
- Default to the POSIX locale (C) if LANG is not set;
- Use shorter ternary null checks on lang and term.

src/login.c

@@ -214,21 +214,13 @@ void env_init(struct passwd* pwd)
 	// clean env
 	environ[0] = NULL;
 
-	if (term != NULL)
-	{
-		setenv("TERM", term, 1);
-	}
-	else
-	{
-		setenv("TERM", "linux", 1);
-	}
-
+    setenv("TERM", term ? term : "linux", 1);
 	setenv("HOME", pwd->pw_dir, 1);
 	setenv("PWD", pwd->pw_dir, 1);
 	setenv("SHELL", pwd->pw_shell, 1);
 	setenv("USER", pwd->pw_name, 1);
 	setenv("LOGNAME", pwd->pw_name, 1);
-	setenv("LANG", lang, 1);
+	setenv("LANG", lang ? lang : "C", 1);
 
 	// Set PATH if specified in the configuration
 	if (strlen(config.path))