adjust calls to ConstantFP::get to new API

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52165 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/tutorial/LangImpl4.html b/docs/tutorial/LangImpl4.html
index b956260..8f5e054 100644
--- a/docs/tutorial/LangImpl4.html
+++ b/docs/tutorial/LangImpl4.html
@@ -863,7 +863,7 @@
 Value *ErrorV(const char *Str) { Error(Str); return 0; }
 
 Value *NumberExprAST::Codegen() {
-  return ConstantFP::get(Type::DoubleTy, APFloat(Val));
+  return ConstantFP::get(APFloat(Val));
 }
 
 Value *VariableExprAST::Codegen() {