Fix problem with empty vararg of boxed primitives in JVM_IR

When calling a generic Java generic method with vararg parameters with empty
vararg, incorrect array creation instruction was generated for primitive type:
NEWARRAY T_INT instead of ANEWARRAY java/lang/Integer. Here for Java method

  public static <T> void takesVarargOfT(T x1, T... xs) {}

corresponding vararg parameter was considered to be of type 'Array<T>?',
which is not a non-null array type, so, NewArray intrinsic failed to generate
proper bytecode.

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -28301,6 +28301,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/vararg/doNotCopyImmediatelyCreatedArrays.kt");
         }
 
+        @TestMetadata("emptyVarargOfBoxedPrimitiveType.kt")
+        public void testEmptyVarargOfBoxedPrimitiveType() throws Exception {
+            runTest("compiler/testData/codegen/box/vararg/emptyVarargOfBoxedPrimitiveType.kt");
+        }
+
         @TestMetadata("kt1978.kt")
         public void testKt1978() throws Exception {
             runTest("compiler/testData/codegen/box/vararg/kt1978.kt");