v.in.ogr: Fix Resource Leak issue in proj.c

[ShubhamDesai]

This pull request fixes issue identified by coverity scan ( CID : 1207667, 1207668, 1415647, 1415695)
Used G_free_key_value() to fix this issue
This pull request refers #5301

[ShubhamDesai]

This pull request fixes issue identified by coverity scan ( CID : 1207667, 1207668, 1415647, 1415695) Used G_free_key_value() to fix this issue This pull request refers #5301

@nilason
for this PR you mentioned in #5301 to address proj.h, v.external, r.external in v.in.ogr but i can't find those files in Coverity scan
what filters to apply

[nilason]

This pull request fixes issue identified by coverity scan ( CID : 1207667, 1207668, 1415647, 1415695) Used G_free_key_value() to fix this issue This pull request refers #5301

@nilason for this PR you mentioned in #5301 to address proj.h, v.external, r.external in v.in.ogr but i can't find those files in Coverity scan what filters to apply

The proj.c files are identical, so the same fix should be applied. (For the same reason did Coverity Scan mixed the issues up, and are not shown everywhere.)

[ShubhamDesai]

This pull request fixes issue identified by coverity scan ( CID : 1207667, 1207668, 1415647, 1415695) Used G_free_key_value() to fix this issue This pull request refers #5301

@nilason for this PR you mentioned in #5301 to address proj.h, v.external, r.external in v.in.ogr but i can't find those files in Coverity scan what filters to apply

The proj.c files are identical, so the same fix should be applied. (For the same reason did Coverity Scan mixed the issues up, and are not shown everywhere.)

I created PRs for v.external(#5448) and r.external(#5449) but i could not find proj.h in v.in.ogr i think its proj.c which is already addressed here.