rename joinpoint field

compiler/mono/src/decision_tree.rs

@@ -956,7 +956,7 @@ pub fn optimize_when<'a>(
         stmt = Stmt::Join {
             id,
             parameters: &[],
-            continuation: env.arena.alloc(body),
+            body: env.arena.alloc(body),
             remainder: env.arena.alloc(stmt),
         };
     }
@@ -1329,7 +1329,7 @@ fn compile_guard<'a>(
         id,
         parameters: arena.alloc([param]),
         remainder: stmt,
-        continuation: arena.alloc(cond),
+        body: arena.alloc(cond),
     }
 }
 
@@ -1622,7 +1622,7 @@ fn decide_to_branching<'a>(
                 Stmt::Join {
                     id: fail_jp_id,
                     parameters: &[],
-                    continuation: fail,
+                    body: fail,
                     remainder: arena.alloc(test_stmt),
                 }
             }