Add fullPathStringTable to identifier.h

Author: atilaneves

src/dmd/identifier.h

@@ -37,6 +37,7 @@ class Identifier : public RootObject
     int dyncast() const;
 
     static StringTable stringtable;
+    static StringTable fullPathStringTable;
     static Identifier *generateId(const char *prefix);
     static Identifier *generateId(const char *prefix, size_t i);
     static Identifier *idPool(const char *s, unsigned len);