Only declare DateStyle in a single compilation unit.

ole/parsedt.c

@@ -66,6 +66,12 @@ char	   *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 char	   *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
 "Thursday", "Friday", "Saturday", NULL};
 
+/* those three vars are useless, and not even initialized, so 
+ * I'd rather remove them all (EPP)
+ */
+int	DateStyle; 
+bool	EuroDates;
+int	CTimeZone;
 
 #define UTIME_MINYEAR (1901)
 #define UTIME_MINMONTH (12)

ole/parsedt.h

@@ -145,9 +145,9 @@ typedef uint32 bool32;			/* >= 32 bits */
 #define USE_SQL_DATES			2
 #define USE_GERMAN_DATES		3
 
-int	DateStyle;
-bool EuroDates;
-int	CTimeZone;
+extern	int	DateStyle;
+extern	bool	EuroDates;
+extern	int	CTimeZone;
 
 typedef double float8;