sqlite3: fix missing pager causing SQLITE_MISUSE

This fixes a missing pager that `libsql_pager_codec` expects to not be
null. All this does is add the pager when we call `sqlite3PagerWalInsert`
to the wal frame we want to insert.

Fixes #1867

Author: LucioFranco

libsql-ffi/bundled/SQLite3MultipleCiphers/src/sqlite3.c

@@ -65363,6 +65363,7 @@ SQLITE_PRIVATE int sqlite3PagerWalInsert(Pager *pPager, unsigned int iFrame, voi
   pghdr.pExtra = NULL;
   pghdr.pgno = pgno;
   pghdr.flags = 0;
+  pghdr.pPager = pPager;
 
   int isCommit = (nTruncate != 0);
 

libsql-ffi/bundled/src/sqlite3.c

@@ -65363,6 +65363,7 @@ SQLITE_PRIVATE int sqlite3PagerWalInsert(Pager *pPager, unsigned int iFrame, voi
   pghdr.pExtra = NULL;
   pghdr.pgno = pgno;
   pghdr.flags = 0;
+  pghdr.pPager = pPager;
 
   int isCommit = (nTruncate != 0);
 

libsql-sqlite3/src/pager.c

@@ -7852,6 +7852,7 @@ int sqlite3PagerWalInsert(Pager *pPager, unsigned int iFrame, void *pBuf, unsign
   pghdr.pExtra = NULL;
   pghdr.pgno = pgno;
   pghdr.flags = 0;
+  pghdr.pPager = pPager;
 
   int isCommit = (nTruncate != 0);