Fixed missing quote in macosx symbols_in_program module

Libraries/graph_copy/macosx/symbols_in_program.icl

@@ -46,7 +46,7 @@ exported_clean_symbol i s
 		| s.[i+2]=='T' && s.[i+3]=='u' && s.[i+4]=='p' && s.[i+5]=='l' && s.[i+6]=='e' && s.[i+7]=='\0'
 			= True;
 			= False;
-	| s.[i]=='d' && s.[i+1]=='I' && s.[i+2]=='N' && s.[i+3]=='T' && s.[i+4]=='\0
+	| s.[i]=='d' && s.[i+1]=='I' && s.[i+2]=='N' && s.[i+3]=='T' && s.[i+4]=='\0'
 		= True;
 	| s.[i]=='C' && s.[i+1]=='H' && s.[i+2]=='A' && s.[i+3]=='R' && s.[i+4]=='\0'
 		= True;