Deadlock on sqlite with PrepareStmt = true

[pascal-fischer]

Requirements:

• using sqlite
• setting sqlDB.SetMaxOpenConns to 1
• setting PrepareStmt to true

There seems to be a race condition if we have 2 goroutines try to call the same db read at the same time (for the test I have multiple goroutines so the test is more likely to hit the race condition):

• one call is in a transaction the other one is not -> FAIL
• both calls in a transaction -> SUCCESS
• both calls outside of transaction -> SUCCESS

If we set PrepareStmt to false it will work as expected