Add ALWAYS() macros in wal.c to cover branches that are no longer reachable

following the pager refactoring.

FossilOrigin-Name: 24f24c927c77bb3bb4d26a23dd5d94f964db8033

manifest

@@ -1,8 +1,8 @@
 -----BEGIN PGP SIGNED MESSAGE-----
 Hash: SHA1
 
-C Adjustments\sfor\sbetter\s64K\spage\ssize\shandling.
-D 2010-08-14T21:21:25
+C Add\sALWAYS()\smacros\sin\swal.c\sto\scover\sbranches\sthat\sare\sno\slonger\sreachable\nfollowing\sthe\spager\srefactoring.
+D 2010-08-16T14:18:00
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in ec08dc838fd8110fe24c92e5130bcd91cbb1ff2e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -230,7 +230,7 @@ F src/vdbeblob.c 258a6010ba7a82b72b327fb24c55790655689256
 F src/vdbemem.c e5673f81a2381b35c60e73ef0a8502be2ab1041e
 F src/vdbetrace.c 864cef96919323482ebd9986f2132435115e9cc2
 F src/vtab.c 0e8e0cb30dffb078367e843e84e37ef99236c7e4
-F src/wal.c c2d20c37c594e8d67facb273184fcd70e881bd02
+F src/wal.c 6b170507776d01e1af01d19762564b75f1e0c98d
 F src/wal.h 96669b645e27cd5a111ba59f0cae7743a207bc3c
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
 F src/where.c 7db3e41c2a846f9deeb24f1bbb75461b4010b7b5
@@ -846,14 +846,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P db9539f2ceabd3c5a3eb5d4701f80f4e7da9344d
-R 1a92e64b60334d2b1f13f1288894a05a
+P faf1974e2de321bfefb68b81d702ae69771933ef
+R d448d7a55c7f1edda8088cf8cf2f24b3
 U drh
-Z cb5fbd482dc54c48c890fe543adb260b
+Z 0dbfc6c0fd736ea91ec08670fb6d2090
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manifest.uuid

@@ -1 +1 @@
-faf1974e2de321bfefb68b81d702ae69771933ef
+24f24c927c77bb3bb4d26a23dd5d94f964db8033

src/wal.c

@@ -2188,7 +2188,7 @@ int sqlite3WalRead(
 ** Return the size of the database in pages (or zero, if unknown).
 */
 Pgno sqlite3WalDbsize(Wal *pWal){
-  if( pWal && pWal->readLock>=0 ){
+  if( pWal && ALWAYS(pWal->readLock>=0) ){
     return pWal->hdr.nPage;
   }
   return 0;
@@ -2267,7 +2267,7 @@ int sqlite3WalEndWriteTransaction(Wal *pWal){
 */
 int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){
   int rc = SQLITE_OK;
-  if( pWal->writeLock ){
+  if( ALWAYS(pWal->writeLock) ){
     Pgno iMax = pWal->hdr.mxFrame;
     Pgno iFrame;