couple of fixes to allow generation of generic extension functions

idea/src/org/jetbrains/jet/codegen/JetTypeMapper.java

@@ -232,6 +232,10 @@ public class JetTypeMapper {
             return Type.getObjectType(jvmName((ClassDescriptor) descriptor, kind));
         }
 
+        if (descriptor instanceof TypeParameterDescriptor) {
+            return mapType(((TypeParameterDescriptor) descriptor).getBoundsAsType(), kind);
+        }
+
         throw new UnsupportedOperationException("Unknown type " + jetType);
     }
 

idea/src/org/jetbrains/jet/codegen/StackValue.java

@@ -152,7 +152,12 @@ public abstract class StackValue {
         }
         else if (this.type.getSort() == Type.OBJECT && type.getSort() <= Type.DOUBLE) {
             if (this.type.equals(JetTypeMapper.TYPE_OBJECT)) {
-                v.checkcast(Type.getObjectType("java/lang/Number"));
+                if (type.getSort() == Type.BOOLEAN) {
+                    v.checkcast(Type.getObjectType("java/lang/Boolean"));
+                }
+                else {
+                    v.checkcast(Type.getObjectType("java/lang/Number"));
+                }
             }
             unbox(type, v);
         }

idea/testData/codegen/extensionFunctions/generic.jet

@@ -16,6 +16,6 @@ fun box(): String {
   list.add("Moscow")
   list.add("Munich")
 
-  val m: ArrayList<String> = list.findAll({(name: String) => name.startsWith("M")})
+  val m: ArrayList<String> = list.findAll<String>({(name: String) => name.startsWith("M")})
   return if (m.size() == 2) "OK" else "fail"
 }

idea/tests/org/jetbrains/jet/codegen/ExtensionFunctionsTest.java

@@ -24,7 +24,7 @@ public class ExtensionFunctionsTest extends CodegenTestCase {
         assertThrows(foo, Exception.class, null, new StringBuilder());
     }
 
-    public void _testGeneric() throws Exception {
+    public void testGeneric() throws Exception {
         blackBoxFile("extensionFunctions/generic.jet");
     }
 }