mysql tried to remove a tmpfile that didn't exist, fixed check for this

ChangeLog

@@ -3,6 +3,7 @@ version 0.9.4 -- unreleased
 	mysql, pgsql, svn: fixed inversed vsname emptyness check
 	mysql:
 	 . Fixed improper use of $vuserhome (Debian: #351083)
+	 . Fixed erroneous removal of tmpfile when it didn't exit
     lib changes
 	vserver:
 	 . init_vservers: fixed Debian bug #351083 (improper readlink syntax)

handlers/mysql

@@ -277,7 +277,7 @@ fi
 fi
 
 # clean up tmp config file
-if [ "$dbusername" != "" ]
+if [ "$dbusername" != "" -a "$dbpassword" != "" ]
 then
 	## clean up tmp config file
 	debug "rm $mycnf"