redundant cast: do not mark casts to raw types redundant (IDEA-71419)

java/java-tests/testData/inspection/redundantCast/generics/RawCast/src/Test.java

@@ -1,3 +1,4 @@
+import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 
@@ -9,3 +10,12 @@ public class Main {
         System.out.println(map);
     }
 }
+
+interface I {}
+class C implements I {}
+class U {
+  void foo() {
+    List<C> listOfC = null;
+    List<I> listOfI = (List) listOfC;
+  }
+}

java/openapi/src/com/intellij/psi/util/RedundantCastUtil.java

@@ -447,6 +447,8 @@ public class RedundantCastUtil {
     }
     else if (castType instanceof PsiClassType && ((PsiClassType)castType).hasParameters()) {
       if (opType instanceof PsiClassType && ((PsiClassType)opType).isRaw()) return true;
+    } else if (castType instanceof PsiClassType && ((PsiClassType)castType).isRaw()) {
+      if (opType instanceof PsiClassType && ((PsiClassType)opType).hasParameters()) return true;
     }
 
     PsiElement parent = typeCast.getParent();