Fixed segfault in connect when specifying no database name.

src/interfaces/ecpg/ecpglib/connect.c

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/connect.c,v 1.23 2004/08/29 05:06:59 momjian Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/connect.c,v 1.24 2004/12/30 09:36:37 meskes Exp $ */
 
 #define POSTGRES_ECPG_INTERNAL
 #include "postgres_fe.h"
@@ -242,7 +242,7 @@ ECPGconnect(int lineno, int c, const char *name, const char *user, const char *p
 	struct sqlca_t *sqlca = ECPGget_sqlca();
 	enum COMPAT_MODE compat = c;
 	struct connection *this;
-	char	   *dbname = strdup(name),
+	char	   *dbname = name ? strdup(name) : NULL,
 			   *host = NULL,
 			   *tmp,
 			   *port = NULL,
@@ -275,6 +275,8 @@ ECPGconnect(int lineno, int c, const char *name, const char *user, const char *p
 	if (dbname == NULL && connection_name == NULL)
 		connection_name = "DEFAULT";
 
+	if (dbname != NULL)
+	{	
 		/* get the detail information out of dbname */
 		if (strchr(dbname, '@') != NULL)
 		{
@@ -390,6 +392,9 @@ ECPGconnect(int lineno, int c, const char *name, const char *user, const char *p
 		}
 		else
 			realname = strdup(dbname);
+	}
+	else
+		realname = NULL;
 
 	/* add connection to our list */
 #ifdef ENABLE_THREAD_SAFETY

src/interfaces/ecpg/ecpglib/memory.c

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/memory.c,v 1.5 2003/11/29 19:52:08 pgsql Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/memory.c,v 1.6 2004/12/30 09:36:37 meskes Exp $ */
 
 #define POSTGRES_ECPG_INTERNAL
 #include "postgres_fe.h"
@@ -46,8 +46,12 @@ ECPGrealloc(void *ptr, long size, int lineno)
 char *
 ECPGstrdup(const char *string, int lineno)
 {
-	char	   *new = strdup(string);
+	char	   *new;
 
+	if (string == NULL)
+		return NULL;
+	
+	new = strdup(string);
 	if (!new)
 	{
 		ECPGraise(lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);