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#### Pre-Submission Checklist
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in `doc/` subfolder, the README file is autogenerated)

#### Type Of Change
- [x] Small bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)

#### Checklist:
<!-- Go over all points below, and after creating the PR, tick the checkboxes 
that apply -->
- [ ] PR should be backported to stable branches
- [x] Tested changes locally
- [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description
<!-- Describe your changes in detail -->
Fix the following issues found by Coverity:
3c86d68 fixes defect 
[85605](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916961&defectInstanceId=6138921&mergedDefectId=85605)
7f603ec fixes defect 
[86015](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916961&defectInstanceId=6138739&mergedDefectId=86015)
2772f09 fixes defects 
[85807](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916966&defectInstanceId=6138583&mergedDefectId=85807)
 and 
[85651](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916966&defectInstanceId=6138536&mergedDefectId=85651)
 
d8fdcb3 fixes defects 
[153773](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916953&defectInstanceId=6138609&mergedDefectId=153773),
 
[85749](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916953&defectInstanceId=6138914&mergedDefectId=85749)
 and 
[85702](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916953&defectInstanceId=6138916&mergedDefectId=85702)
3a9365f fixes defects 
[85541](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916951&defectInstanceId=6138441&mergedDefectId=85541)
 and 
[85543](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916951&defectInstanceId=6138446&mergedDefectId=85543)
dbafb5a fixes defect 
[85484](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916961&defectInstanceId=6138438&mergedDefectId=85484)
535eb88 fixes defect 
[155203](https://scan8.coverity.com/reports.htm#v32382/p10993/fileInstanceId=17916969&defectInstanceId=6138778&mergedDefectId=155203)
You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/1199

-- Commit Summary --

  * carrierroute: avoid out-of-bounds access when resetting opts
  * carrierroute: check pointer before dereferencing it
  * carrieroute: remove logically dead code
  * carrierroute: avoid comparing size_t types with negative values
  * carrierroute: check return value for fseek
  * carrierroute: avoid truncating value returned by fgetc
  * carrierroute: avoid ovverruning a fixed sized buffer

-- File Changes --

    M src/modules/carrierroute/cr_config.c (125)
    M src/modules/carrierroute/cr_db.c (6)
    M src/modules/carrierroute/cr_fifo.c (11)
    M src/modules/carrierroute/cr_func.c (14)
    M src/modules/carrierroute/parser_carrierroute.c (13)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/1199.patch
https://github.com/kamailio/kamailio/pull/1199.diff

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