Fix table counts during Q2A installation

qa-include/db/install.php

@@ -555,7 +555,7 @@ function qa_array_to_keys($array)
  */
 function qa_db_missing_tables($definitions)
 {
-	$keydbtables = qa_array_to_keys(qa_db_list_tables());
+	$keydbtables = qa_array_to_keys(qa_db_list_tables(true));
 
 	$missing = array();
 
@@ -776,7 +776,7 @@ function qa_db_upgrade_tables()
 
 	// Write-lock all Q2A tables before we start so no one can read or write anything
 
-	$keydbtables = qa_array_to_keys(qa_db_list_tables());
+	$keydbtables = qa_array_to_keys(qa_db_list_tables(true));
 
 	foreach ($definitions as $rawname => $definition)
 		if (isset($keydbtables[qa_db_add_table_prefix($rawname)]))

qa-include/qa-db.php

@@ -448,10 +448,19 @@ function qa_db_list_tables_lc()
 
 /**
  * Return an array of the names of all tables in the Q2A database.
+ *
+ * @param bool $onlyTablesWithPrefix Determine if the result should only include tables with the
+ * QA_MYSQL_TABLE_PREFIX or if it should include all tables in the database.
  */
-function qa_db_list_tables()
+function qa_db_list_tables($onlyTablesWithPrefix = false)
 {
-	return qa_db_read_all_values(qa_db_query_raw('SHOW TABLES'));
+	$query = 'SHOW TABLES';
+
+	if ($onlyTablesWithPrefix) {
+		$query .= ' LIKE "' . QA_MYSQL_TABLE_PREFIX . '%"';
+	}
+
+	return qa_db_read_all_values(qa_db_query_raw($query));
 }