fix: fix symlink handling (#4054)

Fix symlink handling added by commit
f13f559: if one of the file is a link,
filenames list will be updated resulting in the loop ending before all
links are removed. To avoid this issue, loop on a copy of filenames.

Signed-off-by: Fabrice Fontaine <fabrice.fontaine@orange.com>

cve_bin_tool/util.py

@@ -364,7 +364,7 @@ def walk(self, roots: list[str] | None = None) -> Iterator[str]:
         for root in roots:
             for dirpath, dirnames, filenames in os.walk(root):
                 # Filters
-                for filename in filenames:
+                for filename in filenames.copy():
                     try:
                         if (
                             not self.pattern_match(