Silence -Wmaybe-uninitialized compiler warnings in dbcommands.c.

When compiling postgres using gcc -O3, there are false-positive
warnings about the now initialized variables. Silence them.

Author: Peter Eisentraut, Andres Freund
Discussion: https://postgr.es/m/15fb2350-b8b8-e188-278f-0b34fdee5210@2ndquadrant.com

diff --git a/src/backend/commands/dbcommands.c b/src/backend/commands/dbcommands.c
index 95881a85509bae3854bced2082fbee82e4bd1a36..01d66212e9815d415ef217b694ac6e9014885ee8 100644 (file)
--- a/src/backend/commands/dbcommands.c
+++ b/src/backend/commands/dbcommands.c
@@ -26,6 +26,7 @@
 #include "access/genam.h"
 #include "access/heapam.h"
 #include "access/htup_details.h"
+#include "access/multixact.h"
 #include "access/tableam.h"
 #include "access/xact.h"
 #include "access/xloginsert.h"
@@ -103,14 +104,14 @@ createdb(ParseState *pstate, const CreatedbStmt *stmt)
        Relation        rel;
        Oid                     src_dboid;
        Oid                     src_owner;
-       int                     src_encoding;
-       char       *src_collate;
-       char       *src_ctype;
+       int                     src_encoding = -1;
+       char       *src_collate = NULL;
+       char       *src_ctype = NULL;
        bool            src_istemplate;
        bool            src_allowconn;
-       Oid                     src_lastsysoid;
-       TransactionId src_frozenxid;
-       MultiXactId src_minmxid;
+       Oid                     src_lastsysoid = InvalidOid;
+       TransactionId src_frozenxid = InvalidTransactionId;
+       MultiXactId src_minmxid = InvalidMultiXactId;
        Oid                     src_deftablespace;
        volatile Oid dst_deftablespace;
        Relation        pg_database_rel;