correct documentation on rand-functions return values

src/misc/rand.c

@@ -210,7 +210,7 @@ double vlc_drand48 (void)
  * @warning Series generated by this function are not reproducible.
  * Use nrand48() if you need reproducible series.
  *
- * @return a double value within [0.0, 1.0] inclusive
+ * @return a double value within [0.0, 2^32-1] inclusive
  */
 long vlc_lrand48 (void)
 {
@@ -230,7 +230,7 @@ long vlc_lrand48 (void)
  * @warning Series generated by this function are not reproducible.
  * Use jrand48() if you need reproducible series.
  *
- * @return a double value within [0.0, 1.0] inclusive
+ * @return a double value within [-2^32, 2^32-1] inclusive
  */
 long vlc_mrand48 (void)
 {