switched UTIL_refFilename() to an assert()
diff --git a/programs/util.c b/programs/util.c
index bb511bd..3c541c5 100644
--- a/programs/util.c
+++ b/programs/util.c
@@ -372,7 +372,7 @@
 
 void UTIL_refFilename(FileNamesTable* fnt, const char* filename)
 {
-    if (fnt->tableCapacity <= fnt->tableSize) abort();
+    assert(fnt->tableSize < fnt->tableCapacity);
     fnt->fileNames[fnt->tableSize] = filename;
     fnt->tableSize++;
 }