Fix issue utelle#145

Set globalCipherCount to 0 in function sqlite3mcTermCipherTables, so that the SQLite initialization and termination code can be called multiple times in an application without causing problems.

Typically, the SQLite initialization and termination code should be called only once, at starting an application and at terminating an application.

src/sqlite3mc.c

@@ -3,7 +3,7 @@
 ** Purpose:     Amalgamation of the SQLite3 Multiple Ciphers encryption extension for SQLite
 ** Author:      Ulrich Telle
 ** Created:     2020-02-28
-** Copyright:   (c) 2006-2022 Ulrich Telle
+** Copyright:   (c) 2006-2024 Ulrich Telle
 ** License:     MIT
 */
 
@@ -662,6 +662,7 @@ sqlite3mcTermCipherTables()
       sqlite3_free(globalCodecParameterTable[n].m_params);
     }
   }
+  globalCipherCount = 0;
 }
 
 int