Compiler fixes for GCC with -Og

ASTERISK-29144

Change-Id: I2a72c072083b4492a223c6f9d73d21f4f424db62

addons/ooh323c/src/ooq931.c

@@ -585,7 +585,7 @@ int ooDecodeUUIE(OOCTXT* pctxt, Q931Message *q931Msg)
    unsigned int i;
    ASN1BOOL aligned=TRUE;
    int stat;
-   Q931InformationElement *ie;
+   Q931InformationElement *ie=NULL;
    /* OOCTXT *pctxt = &gH323ep.msgctxt; */
    if(q931Msg ==NULL)
    {

apps/app_directory.c

@@ -396,7 +396,7 @@ static int select_item_menu(struct ast_channel *chan, struct directory_item **it
 {
 	struct directory_item **block, *item;
 	int i, limit, res = 0;
-	char buf[9];
+	char buf[7+12]; /* INT_MIN has a length of 12 chars */
 
 	/* option p(n): cellphone pause option */
 	select_item_pause(chan, flags, opts);

apps/app_voicemail.c

@@ -11303,7 +11303,7 @@ static int vm_authenticate(struct ast_channel *chan, char *mailbox, int mailbox_
 			int skipuser, int max_logins, int silent)
 {
 	int useadsi = 0, valid = 0, logretries = 0;
-	char password[AST_MAX_EXTENSION], *passptr;
+	char password[AST_MAX_EXTENSION], *passptr = NULL;
 	struct ast_vm_user vmus, *vmu = NULL;
 
 	/* If ADSI is supported, setup login screen */

funcs/func_odbc.c

@@ -1181,7 +1181,7 @@ static int free_acf_query(struct acf_odbc_query *query)
 static int init_acf_query(struct ast_config *cfg, char *catg, struct acf_odbc_query **query)
 {
 	const char *tmp;
-	const char *tmp2;
+	const char *tmp2 = NULL;
 	int i;
 
 	if (!cfg || !catg) {