extensions CHANGE avoid unnecessary variable

- the variable came from copy pasted code, there was already a variable of
  the sufficient type that can be used
diff --git a/src/parser_yin.c b/src/parser_yin.c
index a080d66..617522e 100644
--- a/src/parser_yin.c
+++ b/src/parser_yin.c
@@ -7538,7 +7538,6 @@
     long long int ll;
     unsigned long u;
     int i;
-    int64_t v_;
 
 #define YIN_EXTCOMPLEX_GETPLACE(STMT, TYPE)                                          \
     p = lys_ext_complex_get_substmt(STMT, ext, &info);                               \
@@ -7838,10 +7837,10 @@
             }
 
             /* convert it to int32_t */
-            v_ = strtoll(value, NULL, 10);
+            ll = strtoll(value, NULL, 10);
 
             /* range check */
-            if (v_ < INT32_MIN || v_ > INT32_MAX) {
+            if (ll < INT32_MIN || ll > INT32_MAX) {
                 LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, value, node->name);
                 goto error;
             }
@@ -7852,7 +7851,7 @@
 
             /* store the value */
             *(int32_t **)p = malloc(sizeof(int32_t));
-            (**(int32_t **)p) = (int32_t)v_;
+            (**(int32_t **)p) = (int32_t)ll;
 
             YIN_EXTCOMPLEX_ENLARGE(int32_t*);
         } else if (!strcmp(node->name, "position")) {