Merge pull request #21497 from alalek:fix_build_gcc12_3.4

modules/core/src/persistence_base64.cpp

@@ -164,7 +164,7 @@ size_t base64_decode(char const * src, char * dst, size_t off, size_t cnt)
 bool base64_valid(uint8_t const * src, size_t off, size_t cnt)
 {
     /* check parameters */
-    if (src == 0 || src + off == 0)
+    if (src == 0)
         return false;
     if (cnt == 0U)
         cnt = std::strlen(reinterpret_cast<char const *>(src));