Check for tables existing even if database version is correct in case upgrade failed.
This would allow the best chance of recovery in the wordpress admin screens
Use show tables query instead of information schema
Changed show tables query
added missing return value
adjsuted initialization logic to handle bot user id's, invalid user id from wp
added blank line
Merge commit '555d1b32b616bdf38ed8f98d182e54d991e27d06' into pr-visitor-meta

Conflicts:
	wpsc-includes/wpsc-meta-visitor.php
Merge pull request #890 from JeffPyeBrook/pr-visitor-meta

Check for tables existing even if database version is correct