bugfix:SrsMetaCache memleak

[bluestn]

bugfix: SrsMetaCache memleak

[codecov-commenter]

Codecov Report

Merging #2887 (c65b954) into 4.0release (dc43a11) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@              Coverage Diff               @@
##           4.0release    #2887      +/-   ##
==============================================
- Coverage       60.22%   60.21%   -0.01%     
==============================================
  Files             121      121              
  Lines           51076    51078       +2     
==============================================
  Hits            30758    30758              
- Misses          20318    20320       +2     

| Impacted Files | Coverage Δ | |'

Translated to English while maintaining the markdown structure:

'| Impacted Files | Coverage Δ | |
|---|---|---|
| trunk/src/app/srs_app_source.cpp | 0.66% <0.00%> (-0.01%) | ⬇️ |

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Translated to English while maintaining the markdown structure:

'> Δ = absolute <relative> (impact), ø = not affected, ? = missing data

Powered by Codecov. Last update dc43a11...c65b954. Read the comment docs.

TRANS_BY_GPT3

[winlinvip]

@bluestn Good work! 👍