Address some valgrind issues

https://codereview.appspot.com/7448051/



git-svn-id: http://skia.googlecode.com/svn/trunk@7966 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkString.h b/include/core/SkString.h
index 4366630..db32dca 100644
--- a/include/core/SkString.h
+++ b/include/core/SkString.h
@@ -51,7 +51,7 @@
 
 static inline char *SkStrDup(const char string[]) {
     char *ret = (char *) sk_malloc_throw(strlen(string)+1);
-    memcpy(ret,string,strlen(string));
+    memcpy(ret,string,strlen(string)+1);
     return ret;
 }