Fix compiler errors/warnings in r8355



git-svn-id: http://skia.googlecode.com/svn/trunk@8357 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/debugger/SkDrawCommand.cpp b/debugger/SkDrawCommand.cpp
index e7936a2..f731ed7 100644
--- a/debugger/SkDrawCommand.cpp
+++ b/debugger/SkDrawCommand.cpp
@@ -290,7 +290,7 @@
 
     // TODO: add display of actual data?
     SkString* str = new SkString;
-    str->appendf("length: %d", length);
+    str->appendf("length: %d", (int) length);
     fInfo.push(str);
 }