correction bug expression de toLLVM, tout les test fragment0 marchent

src/main/java/TP2/llvm/Interface.java

@@ -40,6 +40,7 @@ public interface Interface {
     //////////ExpressionLLVM (expression)
     public interface ExpressionLLVM{
         public String prettyprinter(); 
+        public TypeLLVM getType();
     }
 
     public interface ExpressionLLVMVisitor<H,S> {