cgen: fix code generation for array.clear (#18792)

vlib/v/gen/c/fn.v

@@ -1281,7 +1281,7 @@ fn (mut g Gen) method_call(node ast.CallExpr) {
 		receiver_type_name = 'map'
 	}
 	if final_left_sym.kind == .array && !(left_sym.kind == .alias && left_sym.has_method(node.name))
-		&& node.name in ['repeat', 'sort_with_compare', 'free', 'push_many', 'trim', 'first', 'last', 'pop', 'clone', 'reverse', 'slice', 'pointers'] {
+		&& node.name in ['clear', 'repeat', 'sort_with_compare', 'free', 'push_many', 'trim', 'first', 'last', 'pop', 'clone', 'reverse', 'slice', 'pointers'] {
 		if !(left_sym.info is ast.Alias && typ_sym.has_method(node.name)) {
 			// `array_Xyz_clone` => `array_clone`
 			receiver_type_name = 'array'

vlib/v/tests/array_clear_test.v

@@ -0,0 +1,29 @@
+struct Registry[T] {
+mut:
+	events []EventHandler[T]
+}
+
+struct EventHandler[T] {
+	name T
+}
+
+fn (mut r Registry[T]) test() {
+	mut events := []EventHandler[string]{}
+	r.events << EventHandler[string]{
+		name: 'test'
+	}
+	assert 1 == r.events.len
+
+	r.events.clear()
+	events.clear()
+
+	assert events.len == r.events.len
+}
+
+fn test_main() {
+	mut registry := &Registry[string]{
+		events: []
+	}
+	registry.test()
+	assert dump(registry.events).len == 0
+}