ccutil/tessdatamanager: Fix resource leak

Coverity report:

CID 1340278 (#1 of 1): Resource leak (RESOURCE_LEAK)
11. leaked_storage: Variable output_file going out of scope leaks the storage it points to.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

ccutil/tessdatamanager.cpp

@@ -139,6 +139,7 @@ bool TessdataManager::CombineDataFiles(
   if (fseek(output_file,
             sizeof(inT32) + sizeof(inT64) * TESSDATA_NUM_ENTRIES, SEEK_SET)) {
     tprintf("Error seeking %s\n", output_filename);
+    fclose(output_file);
     return false;
   }