WINEDIT: make psql create home (%APPDATA%\postgresql) directory

when it uses default path to the history file and this directory doesn't
exist.
Fixes PGPRO-1392

Author: vbwagner

src/bin/psql/input.c

@@ -9,6 +9,10 @@
 
 #ifndef WIN32
 #include <unistd.h>
+#else
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
 #endif
 #include <fcntl.h>
 #include <limits.h>
@@ -366,7 +370,6 @@ initializeInput(int flags)
 		history_lines_added = 0;
 
 		histfile = GetVariable(pset.vars, "HISTFILE");
-
 		if (histfile == NULL)
 		{
 			char	   *envhist;
@@ -380,14 +383,24 @@ initializeInput(int flags)
 		{
 			if (get_home_path(home))
 #ifdef HAVE_WIN32_LIBEDIT
+			{
+				struct _stat buffer;
 				psql_history = psprintf("%s\\%s", home, PSQLHISTORY);
+				/* Check if home exists and create it if needed,
+				   because there is no guarantee that it exits on Win32 */
+				if (_stat(home,&buffer)!=0 && errno == ENOENT) 
+				{
+						_mkdir(home);
+				}
+			}
 #else
 				psql_history = psprintf("%s/%s", home, PSQLHISTORY);
 #endif
 		}
 		else
 		{
 			psql_history = pg_strdup(histfile);
+			fprintf(stderr,"Expanding tilde\n");
 			expand_tilde(&psql_history);
 		}