making the else branch have less priority

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

lang/src/son.rs

@@ -2137,7 +2137,7 @@ impl<'a> Codegen<'a> {
                         }
                     }
 
-                    if let Some(body) = else_branch.or(matching_branch) {
+                    if let Some(body) = matching_branch.or(else_branch) {
                         self.expr(&body)?;
                     }
                 } else {