Merge pull request #320 from kaandocal/master

Fixed error message for @reaction_network with no reactions

Author: isaacsas

src/reaction_network.jl

@@ -87,7 +87,7 @@ end
 
 #Returns a empty network (with, or without, parameters declared)
 macro reaction_network(parameters...)
-    !isempty(intersect(forbidden_symbols,parameters)) && error("The following symbol(s) are used as reactants or parameters: "*((map(s -> "'"*string(s)*"', ",intersect(forbidden_symbols,reactants,parameters))...))*"this is not permited.")
+    !isempty(intersect(forbidden_symbols,parameters)) && error("The following symbol(s) are used as parameters: "*((map(s -> "'"*string(s)*"', ",intersect(forbidden_symbols,parameters))...))*"this is not permited.")
     return Expr(:block,:(@parameters $((:t,parameters...)...)),
                 :(ReactionSystem(Reaction[],
                                  t,