Make sure the genesis block is present after reindex

src/main.h

@@ -133,6 +133,8 @@ FILE* OpenBlockFile(const CDiskBlockPos &pos, bool fReadOnly = false);
 FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly = false);
 /** Import blocks from an external file */
 bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp = NULL);
+/** Initialize a new block tree database + block data on disk */
+bool InitBlockIndex();
 /** Load the block tree and coins database from disk */
 bool LoadBlockIndex();
 /** Verify consistency of the block and coin databases */