COMP: consistent FatalError/FatalIOError exit types

STYLE: hostName() is short name, don't need parameter

applications/utilities/preProcessing/setAlphaField/alphaFieldFunctions/implicitFunctions/composedFunction/composedFunctionImplicitFunction.C

@@ -137,7 +137,7 @@ composedFunctionImplicitFunction
         {
             FatalIOErrorInFunction(funcDict)
                 << "Entry " << key << " is not a dictionary" << endl
-                << exit(FatalError);
+                << exit(FatalIOError);
         }
 
         const dictionary& subdict = dEntry.dict();