Use variable arrays if compiler supports C99, this saves a small amount of memory

darcs-hash:20060613172251-ac50b-1e19294700c9b9b72e2254f676004e7d9dceea44.gz

env.c

@@ -104,7 +104,11 @@ typedef struct env_node
 typedef struct var_entry
 {
 	int export; /**< Whether the variable should be exported */
+#if __STDC_VERSION__ < 199901L
 	wchar_t val[1]; /**< The value of the variable */
+#else
+	wchar_t val[]; /**< The value of the variable */
+#endif
 }
 	var_entry_t;