HPCC-23866 Avoid logging missing syntaxCheck function to stdout

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>

ecl/hql/hqlfold.cpp

@@ -1367,7 +1367,7 @@ IValue * foldExternalCall(IHqlExpression* expr, unsigned foldOptions, ITemplateC
     void *funcptr = loadExternalEntryPoint(expr, foldOptions, templateContext, library.str(), entry.str(), hDll);
     if (!funcptr)
     {
-        UERRLOG("Failed to load function %s", entry.str());
+        DBGLOG("Failed to load function %s", entry.str());
         return NULL;
     }
     return doFoldExternalCall(expr, foldOptions, templateContext, library.str(), entry.str(), funcptr);