Add explicit > check for params length

Author: jseminck

lib/rules/prop-types.js

@@ -174,7 +174,7 @@ module.exports = {
      */
     function isSuperTypeParameterPropsDeclaration(node) {
       if (node && node.type === 'ClassDeclaration') {
-        if (node.superTypeParameters && node.superTypeParameters.params.length) {
+        if (node.superTypeParameters && node.superTypeParameters.params.length > 0) {
           return true;
         }
       }

tests/lib/rules/prop-types.js

@@ -29,7 +29,7 @@ const settings = {
 require('babel-eslint');
 
 function withAndWithoutFlowVersion(flowVersion, test) {
-  return [test, Object.assign({}, test, {settings: {react: {flowVersion}}})];
+  return [test, Object.assign({}, test, {settings: {react: {flowVersion: flowVersion}}})];
 }
 
 // ------------------------------------------------------------------------------