Resolve "[CLANG18] MSAN: use-of-uninitialized-value in lib_com/cldfb_evs_fx.c:952:22"

• Related issues: #2319 (closed)
• Requested reviewers: @kiene

Reason why this change is needed

hs->flags is currently used uninitialized in openCldfb()

Description of the change

Initialize hs->flags with 0 before using it

Affected operating points

• All is BE

Closes #2319 (closed)