ncd: NCDStringIndex: increase initial capacity and size of bucket array

ncd/NCDStringIndex.h

@@ -36,8 +36,8 @@
 #include <structure/CHash.h>
 #include <base/DebugObject.h>
 
-#define NCDSTRINGINDEX_INITIAL_CAPACITY 1
-#define NCDSTRINGINDEX_INITIAL_HASH_BUCKETS 1
+#define NCDSTRINGINDEX_INITIAL_CAPACITY 256
+#define NCDSTRINGINDEX_INITIAL_HASH_BUCKETS 256
 
 typedef int NCD_string_id_t;