[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt2195.fir.kt

@@ -0,0 +1,8 @@
+//KT-2195 error "Only safe calls are allowed ..." but it is function param (val)
+package foo
+
+private fun <T> sendCommand(errorCallback: (()->Unit)? = null) {
+    if (errorCallback != null) {
+        errorCallback()
+    }
+}