Make DifferentKotlinGradleVersionInspection inpection work for classpath call with braces

idea/src/org/jetbrains/kotlin/idea/inspections/gradle/DifferentKotlinGradleVersionInspection.kt

@@ -106,8 +106,11 @@ class DifferentKotlinGradleVersionInspection : GradleBaseInspection() {
         val KOTLIN_PLUGIN_PATH_MARKER = "${KotlinWithGradleConfigurator.GROUP_ID}/${KotlinWithGradleConfigurator.GRADLE_PLUGIN_ID}/"
 
         private fun getHeuristicKotlinPluginVersion(classpathStatement: GrCallExpression): String? {
-            val argument = classpathStatement.getChildrenOfType<GrCommandArgumentList>().firstOrNull() ?: return null
-            val grLiteral = argument.children.firstOrNull()?.let { it as? GrLiteral } ?: return null
+            val argumentList = when {
+                classpathStatement is GrMethodCall -> classpathStatement.argumentList
+                else -> classpathStatement.getChildrenOfType<GrCommandArgumentList>().singleOrNull()
+            } ?: return null
+            val grLiteral = argumentList.children.firstOrNull() as? GrLiteral ?: return null
 
             if (grLiteral is GrString && grLiteral.injections.size == 1) {
                 val versionInjection = grLiteral.injections.first() ?: return null

idea/testData/inspections/gradleWrongPluginVersion/inspectionData/expected.xml

@@ -52,4 +52,13 @@
         <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">Kotlin Gradle and IDE plugins versions are different</problem_class>
         <description>Kotlin version that is used for building with Gradle (0.0.1) differs from the one bundled into the IDE plugin ($PLUGIN_VERSION)</description>
     </problem>
+
+    <problem>
+        <file>wrongPluginVersionWithBracesCall.gradle</file>
+        <line>6</line>
+        <module>light_idea_test_case</module>
+        <entry_point TYPE="file" FQNAME="wrongPluginVersionWithBracesCall.gradle" />
+        <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">Kotlin Gradle and IDE plugins versions are different</problem_class>
+        <description>Kotlin version that is used for building with Gradle (0.0.1) differs from the one bundled into the IDE plugin ($PLUGIN_VERSION)</description>
+    </problem>
 </problems>

idea/testData/inspections/gradleWrongPluginVersion/wrongPluginVersionWithBracesCall.gradle

@@ -0,0 +1,11 @@
+buildscript {
+  repositories {
+    mavenCentral()
+  }
+  dependencies {
+    classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:0.0.1")
+  }
+}
+
+apply plugin: 'java'
+apply plugin: 'kotlin'