Fixup trait methods even if no traits are used

Trait methods might be non-trivially inherited, in which case we
may have to perform fixup in classes that do not directly use any
traits.

Author: nikic

ext/opcache/ZendAccelerator.c

@@ -4190,16 +4190,12 @@ static int preload_optimize(zend_persistent_script *script)
 	}
 
 	ZEND_HASH_FOREACH_PTR(&script->script.class_table, ce) {
-		if (ce->num_traits) {
-			preload_fix_trait_methods(ce);
-		}
+		preload_fix_trait_methods(ce);
 	} ZEND_HASH_FOREACH_END();
 
 	ZEND_HASH_FOREACH_PTR(preload_scripts, script) {
 		ZEND_HASH_FOREACH_PTR(&script->script.class_table, ce) {
-			if (ce->num_traits) {
-				preload_fix_trait_methods(ce);
-			}
+			preload_fix_trait_methods(ce);
 		} ZEND_HASH_FOREACH_END();
 	} ZEND_HASH_FOREACH_END();
 

ext/opcache/tests/preload_trait_multiple_fixup.inc

@@ -17,3 +17,17 @@ class C1 {
 class C2 extends C1 {
     use T2;
 }
+
+trait T3 {
+    public function method() {
+        // Prevent trivial inheritance.
+        static $x;
+        // Needs to be optimized somehow.
+        $str = "Foo";
+        echo "$str\n";
+    }
+}
+class C3 {
+    use T3;
+}
+class C4 extends C3 {}

ext/opcache/tests/preload_trait_multiple_fixup.phpt

@@ -13,6 +13,8 @@ if (PHP_OS_FAMILY == 'Windows') die('skip Preloading is not supported on Windows
 --FILE--
 <?php
 (new C2)->method();
+(new C4)->method();
 ?>
 --EXPECT--
 Foo
+Foo