Merge pull request #2085 from bbbradsmith/numerical_constant_errors-float

Numerical constant errors and improvements (float)

doc/cc65.sgml

@@ -807,6 +807,9 @@ and the one defined by the ISO standard:
 <itemize>
 
 <item>  The datatypes "float" and "double" are not available.
+        Floating point constants may be used, though they will have to be
+        converted and stored into integer values.
+        Floating point arithmetic expressions are not supported.
         <p>
 <item>  C Functions may pass and return structs (or unions) by value, but only
         of 1, 2 or 4 byte sizes.