* Moved ir/irsymbol.cpp/h into ir/irdsymbol.cpp/h.

* Added #if IN_DMD versioning around DMD backend specific code in the D1 frontend, D2 is currently broken.
* All part of a greater cleanup scheme.

dmd/declaration.c

@@ -255,7 +255,9 @@ TypedefDeclaration::TypedefDeclaration(Loc loc, Identifier *id, Type *basetype,
     this->sem = 0;
     this->inuse = 0;
     this->loc = loc;
+#if IN_DMD
     this->sinit = NULL;
+#endif
 }
 
 Dsymbol *TypedefDeclaration::syntaxCopy(Dsymbol *s)