Update compiler error message regarding the choice of memory allocator defines.

FossilOrigin-Name: 1dada5158215d1816edb69ff2610f9d2259ce19d
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 591d5f0..5934c74 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -163,7 +163,7 @@
 */
 #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_WIN32_MALLOC)+defined(SQLITE_MEMDEBUG)>1
 # error "At most one of the following compile-time configuration options\
- is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG"
+ is allows: SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG"
 #endif
 #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_WIN32_MALLOC)+defined(SQLITE_MEMDEBUG)==0
 # define SQLITE_SYSTEM_MALLOC 1