lifting the restriction for inlining to allow normal functions as well

Signed-off-by: Jakub Doka <jakub.doka2@gmail.com>

lang/src/son.rs

@@ -2575,7 +2575,7 @@ impl<'a> Codegen<'a> {
                 mem::replace(&mut self.ci.inline_ret, prev_inline_ret)?;
             if is_inline
                 && ctrl.get() != prev_ctrl
-                && (!self.ci.nodes[ctrl.get()].kind.is_eca()
+                && (!self.ci.nodes[ctrl.get()].kind.is_call()
                     || self.ci.nodes[ctrl.get()].inputs[0] != prev_ctrl)
             {
                 self.error(body.pos(), "function is makred inline but it contains controlflow");