Make sure large negative arguments to PRAGMA cache_size do not cause

32-bit signed integer overflow.  Also correct a requirements mark.

FossilOrigin-Name: 17c30634a71051158f8d37fd51b3c2a125ad8bd2

2 files changed, 2 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index 7da925c2e..524b71026 100644
--- a/src/main.c
+++ b/src/main.c
@@ -49,7 +49,7 @@ const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
 */
 int sqlite3_libversion_number(void){ return SQLITE_VERSION_NUMBER; }
 
-/* IMPLEMENTATION-OF: R-54823-41343 The sqlite3_threadsafe() function returns
+/* IMPLEMENTATION-OF: R-20790-14025 The sqlite3_threadsafe() function returns
 ** zero if and only if SQLite was compiled with mutexing code omitted due to
 ** the SQLITE_THREADSAFE compile-time option being set to 0.
 */
diff --git a/src/pcache.c b/src/pcache.c
index 0c3e9ee0a..482a188be 100644
--- a/src/pcache.c
+++ b/src/pcache.c
@@ -205,7 +205,7 @@ static int numberOfCachePages(PCache *p){
   if( p->szCache>=0 ){
     return p->szCache;
   }else{
-    return (-1024*p->szCache)/(p->szPage+p->szExtra);
+    return (int)((-1024*(i64)p->szCache)/(p->szPage+p->szExtra));
   }
 }