Fix bad language check in find usages that caused falling to text search

idea/idea-analysis/src/org/jetbrains/kotlin/idea/search/usagesSearch/ExpressionsOfTypeProcessor.kt

@@ -279,7 +279,7 @@ class ExpressionsOfTypeProcessor(
                 val scope = GlobalSearchScope.projectScope(project).excludeFileTypes(KotlinFileType.INSTANCE, XmlFileType.INSTANCE)
                 testLog?.add("Searched references to ${logPresentation(psiClass)} in non-Kotlin files")
                 searchReferences(psiClass, scope) { reference ->
-                    if (reference.element.language != JavaFileType.INSTANCE) { // reference in some JVM language can be method parameter (but we don't know)
+                    if (reference.element.language != JavaLanguage.INSTANCE) { // reference in some JVM language can be method parameter (but we don't know)
                         LOG.info(getFallbackDiagnosticsMessage(reference))
                         downShiftToPlainSearch()
                         return@searchReferences false

idea/testData/findUsages/kotlin/conventions/components/SAM.log

@@ -1,4 +1,7 @@
 Resolved java class to descriptor: JavaSAM
+Searched references to JavaClass.takeSAM(JavaSAM sam) in non-Java files
 Searched references to JavaSAM in non-Kotlin files
 Searched references to pack.A
-Used plain search of parameter a of A(val a: Int, val b: String) in whole search scope
+Used plain search of parameter a of A(val a: Int, val b: String) in LocalSearchScope:
+    CLASS:A
+    { val (x, y) = it }