[dwm] textnw fix

[Szabolcs Nagy]

XTextWidth returns int and now in most places textnw is used as int
thus i propose
-uint textnw
+int textnw

(it adds 2 LOCs without much gain though..)

diff -r c4152a0199c8 dwm.c
--- a/dwm.c     Fri Jun 06 11:49:31 2008 +0200
+++ b/dwm.c     Sun Jun 08 09:28:25 2008 +0200
@@ -166,7 +166,7 @@
 void setup(void);
 void spawn(const void *arg);
 void tag(const void *arg);
-uint textnw(const char *text, uint len);
+int textnw(const char *text, uint len);
 void tile(void);
 void togglebar(const void *arg);
 void togglefloating(const void *arg);
@@ -296,7 +296,8 @@
 
 void
 buttonpress(XEvent *e) {
-       uint i, x, mask;
+       uint i, mask;
+       int x;
        Client *c;
        XButtonPressedEvent *ev = &e->xbutton;
 
@@ -1308,7 +1309,8 @@
 
 void
 setup(void) {
-       uint i, w;
+       uint i;
+       int w;
        XSetWindowAttributes wa;
 
        /* init screen */
@@ -1413,7 +1415,7 @@
        }
 }
 
-uint
+int
 textnw(const char *text, uint len) {
        XRectangle r;