JVM IR: minor, add exception message to IrFrameMap.typeOf

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/irCodegenUtils.kt

@@ -51,7 +51,8 @@ class IrFrameMap : FrameMapBase<IrSymbol>() {
         return super.leave(descriptor)
     }
 
-    fun typeOf(descriptor: IrSymbol): Type = typeMap.getValue(descriptor)
+    fun typeOf(symbol: IrSymbol): Type =
+        typeMap[symbol] ?: error("No mapping for symbol: ${symbol.owner.render()}")
 }
 
 internal val IrFunction.isStatic