[3.13] gh-120155: Fix Coverity issue in zoneinfo load_data() (GH-120232) (#120310)

gh-120155: Fix Coverity issue in zoneinfo load_data() (GH-120232) Declare the 'rv' varaible at the top of the load_data() function to make sure that it's initialized before the first 'goto error' which uses 'rv' (return rv). Fix the Coverity issue: Error: UNINIT (CWE-457): Python-3.12.2/Modules/_zoneinfo.c:1233:5: skipped_decl: Jumping over declaration of ""rv"". Python-3.12.2/Modules/_zoneinfo.c:1284:5: uninit_use: Using uninitialized value ""rv"". 1282| } 1283| 1284|-> return rv; 1285| } 1286| (cherry picked from commit b90bd3e) Co-authored-by: Victor Stinner <vstinner@python.org>

Author: miss-islington

Modules/_zoneinfo.c

@@ -944,6 +944,7 @@ ttinfo_eq(const _ttinfo *const tti0, const _ttinfo *const tti1)
 static int
 load_data(zoneinfo_state *state, PyZoneInfo_ZoneInfo *self, PyObject *file_obj)
 {
+ int rv = 0;
  PyObject *data_tuple = NULL;
 
  long *utcoff = NULL;
@@ -1220,7 +1221,6 @@ load_data(zoneinfo_state *state, PyZoneInfo_ZoneInfo *self, PyObject *file_obj)
  }
  }
 
- int rv = 0;
  goto cleanup;
 error:
  // These resources only need to be freed if we have failed, if we succeed