KT-3574 Assertion error when using ?: in for range

#KT-3574 Fixed

Do not assert that resolvedCall is non-null, since getRangeAsBinaryCall can
return a BinaryCall that doesn't represent a range at all (as specified by the
comment in getRangeAsBinaryCall)

compiler/testData/codegen/box/controlStructures/kt3574.kt

@@ -0,0 +1,9 @@
+fun nil() = null
+
+fun list() = java.util.Arrays.asList("1")
+
+fun box(): String {
+    for (x in nil()?:list()) {
+    }
+    return "OK"
+}