Add missing declarations.

include/ph7int.h

@@ -1892,7 +1892,9 @@ PH7_PRIVATE sxi32 SyByteListFind(const char *zSrc, sxu32 nLen, const char *zList
 PH7_PRIVATE sxi32 SyByteFind2(const char *zStr, sxu32 nLen, sxi32 c, sxu32 *pPos);
 PH7_PRIVATE sxi32 SyByteFind(const char *zStr, sxu32 nLen, sxi32 c, sxu32 *pPos);
 PH7_PRIVATE sxu32 SyStrlen(const char *zSrc);
+PH7_PRIVATE sxu32 Systrcpy(char *zDest, sxu32 nDestLen, const char *zSrc, sxu32 nLen);
 PH7_PRIVATE char *SyStrtok(char *str, const char *sep);
+PH7_PRIVATE sxi32 SyAsciiToHex(sxi32 c);
 #if defined(PH7_ENABLE_THREADS)
 	PH7_PRIVATE const SyMutexMethods *SyMutexExportMethods(void);
 	PH7_PRIVATE sxi32 SyMemBackendMakeThreadSafe(SyMemBackend *pBackend, const SyMutexMethods *pMethods);