Restore call site check in optimized plus site

Author: headius

core/src/main/java/org/jruby/runtime/callsite/PlusCallSite.java

@@ -32,9 +32,15 @@ public IRubyObject call(ThreadContext context, IRubyObject caller, IRubyObject s
     @Override
     public IRubyObject call(ThreadContext context, IRubyObject caller, IRubyObject self, IRubyObject arg1) {
         if (self instanceof RubyFixnum && Builtins.checkIntegerPlus(context)) {
-            return ((RubyFixnum) self).op_plus(context, arg1);
+            CacheEntry cache = this.cache;
+            if (cache instanceof FixnumEntry && cache.typeOk(getMetaClass(self))) {
+                return ((RubyFixnum) self).op_plus(context, arg1);
+            }
         } else if (self instanceof RubyFloat && Builtins.checkFloatPlus(context)) {
-            return ((RubyFloat) self).op_plus(context, arg1);
+            CacheEntry cache = this.secondaryCache;
+            if (cache instanceof FloatEntry && cache.typeOk(getMetaClass(self))) {
+                return ((RubyFloat) self).op_plus(context, arg1);
+            }
         }
         return super.call(context, caller, self, arg1);
     }