Restructure < 7.4 protocol code a bit.
Restructure < 7.4 protocol code a bit.

This avoids accessing unitialized bitmap[0]. It was harmless, as the
uninitialize value that was read was not used for anything, but Coverity
complained about it.

treasure-data/prestogres-odbc,gavioto/psqlodbc,hlinnaka/psqlodbc,Distrotech/psqlodbc,hlinnaka/psqlodbc,gavioto/psqlodbc,Distrotech/psqlodbc,Distrotech/psqlodbc,gavioto/psqlodbc,treasure-data/prestogres-odbc,treasure-data/prestogres-odbc,hlinnaka/psqlodbc