sqlops: fix build with gcc-14

  sqlops_impl.c: In function ‘ops_sql_api_insert’:
  sqlops_impl.c:910:12: error: ‘Jcols’ may be used uninitialized [-Werror=maybe-uninitialized]
    910 |         if (Jcols) cJSON_Delete(Jcols);
        |            ^

Author: sobomax

modules/sqlops/sqlops_impl.c

@@ -843,7 +843,7 @@ static inline int _parse_json_col_and_filter( str *cols, str *filter,
 int ops_sql_api_select(struct db_url *url, struct sip_msg* msg, str *cols,
 		str *table, str *filter, str * order, pvname_list_t* dest, int one_col)
 {
-	cJSON *Jcols, *Jfilter;
+	cJSON *Jcols = NULL, *Jfilter;
 	int ret;
 
 	ret = _parse_json_col_and_filter( cols, filter, &Jcols, &Jfilter);
@@ -868,7 +868,7 @@ int ops_sql_api_select(struct db_url *url, struct sip_msg* msg, str *cols,
 int ops_sql_api_update(struct db_url *url, struct sip_msg* msg, str *cols,
 		str *table, str *filter)
 {
-	cJSON *Jcols, *Jfilter;
+	cJSON *Jcols = NULL, *Jfilter;
 	int ret;
 
 	ret = _parse_json_col_and_filter( cols, filter, &Jcols, &Jfilter);
@@ -892,7 +892,7 @@ int ops_sql_api_update(struct db_url *url, struct sip_msg* msg, str *cols,
 int ops_sql_api_insert(struct db_url *url, struct sip_msg* msg, str *table,
 		str *cols)
 {
-	cJSON *Jcols, *Jfilter;
+	cJSON *Jcols = NULL, *Jfilter;
 	int ret;
 
 	ret = _parse_json_col_and_filter( cols, NULL, &Jcols, &Jfilter);
@@ -916,7 +916,7 @@ int ops_sql_api_insert(struct db_url *url, struct sip_msg* msg, str *table,
 int ops_sql_api_delete(struct db_url *url, struct sip_msg* msg,
 		str *table, str *filter)
 {
-	cJSON *Jcols, *Jfilter;
+	cJSON *Jcols = NULL, *Jfilter;
 	int ret;
 
 	ret = _parse_json_col_and_filter( NULL, filter, &Jcols, &Jfilter);
@@ -940,7 +940,7 @@ int ops_sql_api_delete(struct db_url *url, struct sip_msg* msg,
 int ops_sql_api_replace(struct db_url *url, struct sip_msg* msg, str *table,
 		str *cols)
 {
-	cJSON *Jcols, *Jfilter;
+	cJSON *Jcols = NULL, *Jfilter;
 	int ret;
 
 	ret = _parse_json_col_and_filter( cols, NULL, &Jcols, &Jfilter);