removed superfluous externs as well

dmenu.h

@@ -29,16 +29,16 @@ typedef struct {
 	} font;
 } DC; /* draw context */
 
-extern int screen;
-extern Display *dpy;
-extern DC dc;			/* global drawing context */
+int screen;
+Display *dpy;
+DC dc;			/* global drawing context */
 
 /* draw.c */
-extern void drawtext(const char *text, unsigned long col[ColLast]);
-extern unsigned int textw(const char *text);
-extern unsigned int textnw(const char *text, unsigned int len);
+void drawtext(const char *text, unsigned long col[ColLast]);
+unsigned int textw(const char *text);
+unsigned int textnw(const char *text, unsigned int len);
 
 /* util.c */
-extern void *emalloc(unsigned int size);		/* allocates memory, exits on error */
-extern void eprint(const char *errstr, ...);		/* prints errstr and exits with 1 */
-extern char *estrdup(const char *str);			/* duplicates str, exits on allocation error */
+void *emalloc(unsigned int size);		/* allocates memory, exits on error */
+void eprint(const char *errstr, ...);		/* prints errstr and exits with 1 */
+char *estrdup(const char *str);			/* duplicates str, exits on allocation error */