Warning cleanup from the MSVC compile.

FossilOrigin-Name: 26cd015c0ee1c18dd37f11b47ce35cfa320b3514
diff --git a/src/main.c b/src/main.c
index 9bc4619..e4324e7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1359,8 +1359,8 @@
 static int createCollation(
   sqlite3* db,
   const char *zName, 
-  int enc,
-  int collType,
+  u8 enc,
+  u8 collType,
   void* pCtx,
   int(*xCompare)(void*,int,const void*,int,const void*),
   void(*xDel)(void*)
@@ -1808,7 +1808,7 @@
   int rc;
   sqlite3_mutex_enter(db->mutex);
   assert( !db->mallocFailed );
-  rc = createCollation(db, zName, enc, SQLITE_COLL_USER, pCtx, xCompare, 0);
+  rc = createCollation(db, zName, (u8)enc, SQLITE_COLL_USER, pCtx, xCompare, 0);
   rc = sqlite3ApiExit(db, rc);
   sqlite3_mutex_leave(db->mutex);
   return rc;
@@ -1828,7 +1828,7 @@
   int rc;
   sqlite3_mutex_enter(db->mutex);
   assert( !db->mallocFailed );
-  rc = createCollation(db, zName, enc, SQLITE_COLL_USER, pCtx, xCompare, xDel);
+  rc = createCollation(db, zName, (u8)enc, SQLITE_COLL_USER, pCtx, xCompare, xDel);
   rc = sqlite3ApiExit(db, rc);
   sqlite3_mutex_leave(db->mutex);
   return rc;
@@ -1851,7 +1851,7 @@
   assert( !db->mallocFailed );
   zName8 = sqlite3Utf16to8(db, zName, -1);
   if( zName8 ){
-    rc = createCollation(db, zName8, enc, SQLITE_COLL_USER, pCtx, xCompare, 0);
+    rc = createCollation(db, zName8, (u8)enc, SQLITE_COLL_USER, pCtx, xCompare, 0);
     sqlite3DbFree(db, zName8);
   }
   rc = sqlite3ApiExit(db, rc);