[WP] (whatscooking): issue7: add note regarding huge function

issue7_refract_catch_zero_offset.txt

@@ -66,4 +66,16 @@ Action
   scaled amplitude in a given offset range in scaling mode 2 and 3
 - Problem 3 solved by enforcing non-negative exponent value
 
+Note
+----
+Fortran 95 and later offers a function huge().
+See gfortran documentation.
+The return value can be used to adjust world coordinate limits.
+
+`HUGE(X)' returns the largest number that is not an infinity in
+the model of the type of `X'.
+
+huge(0.)=3.40282347E+38
+huge(0.d0)=1.7976931348623157E+308
+
 ----- END OF issue7_refract_catch_zero_offset.txt -----