Correct data size argument type in resource loading path to unsigned

Source/core/fetch/ScriptResource.cpp

Index: Source/core/fetch/ScriptResource.cpp
diff --git a/Source/core/fetch/ScriptResource.cpp b/Source/core/fetch/ScriptResource.cpp
index 0bc66149d483b8c8dfca1fd318906eca835ff3b7..c7ef8c0d33faf25521c6e2a91e931ee4f771b9b1 100644
--- a/Source/core/fetch/ScriptResource.cpp
+++ b/Source/core/fetch/ScriptResource.cpp
@@ -55,7 +55,7 @@ void ScriptResource::didAddClient(ResourceClient* client)
     Resource::didAddClient(client);
 }
 
-void ScriptResource::appendData(const char* data, int length)
+void ScriptResource::appendData(const char* data, unsigned length)
 {
     Resource::appendData(data, length);
     ResourceClientWalker<ScriptResourceClient> walker(m_clients);