lsteamclinet: fixed potential stack-based buffer overflow in unixlib

Author: Reodus

lsteamclient/unixlib.cpp

@@ -941,7 +941,8 @@ char *steamclient_dos_to_unix_path( const char *src, int is_url )
     {
         if (strncmp( src, file_prot, 7 ) != 0)
         {
-            strcpy( dst, src );
+            strncpy( dst, src, sizeof(buffer) - 1 );
+            dst[sizeof(buffer) - 1] = '\0';
             goto done;
         }