Fix of the memory leaks discoverd with different analyzers.

Author: lawrinn

driver/class/ServerSidePreparedStatement.cpp

@@ -33,6 +33,9 @@ namespace mariadb
 {
   ServerSidePreparedStatement::~ServerSidePreparedStatement()
   {
+    if (parRowCallback) {
+      delete parRowCallback;
+    }
     if (serverPrepareResult) {
       if (serverPrepareResult->canBeDeallocate()) {
         delete serverPrepareResult;
@@ -295,6 +298,9 @@ namespace mariadb
   bool ServerSidePreparedStatement::setParamCallback(ParamCodec* callback, uint32_t param)
   {
     if (param == uint32_t(-1)) {
+      if (parRowCallback) {
+        delete parRowCallback;
+      }
       parRowCallback= callback;
       if (callback != nullptr) {
         mysql_stmt_attr_set(serverPrepareResult->getStatementId(), STMT_ATTR_CB_USER_DATA, (void*)this);

driver/ma_connection.h

@@ -37,7 +37,7 @@ struct MADB_Dbc
   MADB_Env::ListIterator ListItem;
   Client_Charset Charset= {0,nullptr};
   Unique::Protocol guard;
-  unsigned long long LastInsertId;
+  unsigned long long LastInsertId= 0;
   MYSQL*    mariadb=     nullptr;         /* handle to a mariadb connection */
   MADB_Env* Environment= nullptr;         /* global environment */
   MADB_Dsn* Dsn=         nullptr;

driver/ma_dll.c

@@ -30,7 +30,6 @@ BOOL __stdcall DllMain ( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved
       mysql_library_init(0, NULL, NULL);
     break;
     case DLL_PROCESS_DETACH:
-      mysql_library_end();
       DriverGlobalClean();
       break;
     case DLL_THREAD_ATTACH:

driver/ma_driver.cpp

@@ -50,12 +50,13 @@ extern "C" {
   /* {{{  DriverGlobalClean()*/
   void DriverGlobalClean(void)
   {
-    // There is no need to lock here at least the while it used the way it used now -
+    // There is no need to lock here at least while it used the way it used now -
     // only called when library is unloaded
     if (deletedStmt)
     {
       MADB_ListFree(deletedStmt, FALSE);
     }
+    mysql_library_end();
   }
   /* }}} */
 }