Add the #ifdefs for sqlite3ErrName() to sqliteInt.h as well.

FossilOrigin-Name: 400fc4c37ff34e84f5a129a083a567bda840278e
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 2007600..5950f23 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3092,7 +3092,12 @@
 void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
 u8 sqlite3HexToInt(int h);
 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
+
+#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST) || \
+    defined(SQLITE_DEBUG_OS_TRACE)
 const char *sqlite3ErrName(int);
+#endif
+
 const char *sqlite3ErrStr(int);
 int sqlite3ReadSchema(Parse *pParse);
 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int);