#83 endless-loop bug in Search/Replace-All algorithm

The Search/Replace-All algorithm enters an endless loop
when the Replace-String contains the Search-String and
there is at least 1 match.

Reproduction / Example :

The bug occured when I wanted to replace all malloc() -
Calls with debugmalloc() - Calls in my C program.

It looks like this :

0. iteration : malloc(1024);
1. iteration : debugmalloc(1024);
2. iteration : debugdebugmalloc(1024);
3. iteration : debugdebugdebugmalloc(1024);
...
n. iteration : crash