Cleanup: Add default arguments to CodeGenFunction::StartFunction.
Thanks dblaikie for the suggestion!

llvm-svn: 206012
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 56ad76a..7d5a59e 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -1148,8 +1148,8 @@
                      llvm::Function *Fn,
                      const CGFunctionInfo &FnInfo,
                      const FunctionArgList &Args,
-                     SourceLocation Loc,
-                     SourceLocation StartLoc);
+                     SourceLocation Loc = SourceLocation(),
+                     SourceLocation StartLoc = SourceLocation());
 
   void EmitConstructorBody(FunctionArgList &Args);
   void EmitDestructorBody(FunctionArgList &Args);