conditional expression: ensure return type is primitive short in case of short/byte branches (IDEA-126697)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/IDEA126697.java

@@ -0,0 +1,8 @@
+class Test {
+  private static void <warning descr="Private method 'test(java.lang.Short)' is never used">test</warning>(Short s) { System.out.println("Short:" + s); }
+  private static void test(short s) { System.out.println("short:" + s); }
+
+  public static void main(String ... args) {
+    test(true ? new Short((short) 1) : new Byte((byte) 1));
+  }
+}