Fixed FTBFS caused by duplicated variable definitions.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit f95037bc26)

libkholidays/parseholiday.y

@@ -69,8 +69,8 @@ static void      setdoff(int wday, int rel, int month, int day,
 			 int year, int off, int length);
 /*** Variables and structures ***/
 static int	 m, d, y;
-int              kcallineno;	       	/* current line # being parsed */
-FILE            *kcalin;                  /* file currently being processed */
+extern int      kcallineno;	       	/* current line # being parsed */
+extern FILE    *kcalin;                /* file currently being processed */
 int	         yacc_small;		/* small string or on its own line? */
 int	         yacc_stringcolor;	/* color of holiday name text, 1..8 */
 char	        *yacc_string;		/* holiday name text */