prefer-single-call: Fix crash on CallExpression followed by FunctionDeclaration (#2639)

Author: fisker

rules/prefer-single-call.js

@@ -67,7 +67,7 @@ const cases = [
 	},
 ].map(problematicalCase => ({
 	...problematicalCase,
-	test: callExpression => isExpressionStatement(callExpression) && problematicalCase.test(callExpression),
+	test: callExpression => problematicalCase.test(callExpression) && isExpressionStatement(callExpression),
 }));
 
 function create(context) {

test/prefer-single-call.js

@@ -86,6 +86,10 @@ test.snapshot({
 			],
 		},
 		'for (const _ of []) foo.push(bar);',
+		outdent`
+			function bar() {}
+			foo.push(bindEvents);
+		`,
 	],
 	invalid: [
 		outdent`