Fixing a recently added error about the umber of bytes to be copyied

ogr/ogrsf_frmts/miramon/mm_gdal_functions.c

@@ -2410,7 +2410,7 @@ int MM_SecureCopyStringFieldValue(char **pszStringDst, const char *pszStringSrc,
 
     // We just copy the exact number of elements we want to copy.
     // If we copy more than them, some garbage can appear in the record
-    memcpy(*pszStringDst, pszStringSrc, *nStringCurrentLength);
+    memcpy(*pszStringDst, pszStringSrc, strlen(pszStringSrc));
     return 0;
 }