fix extra warning

dmenu.c

@@ -41,7 +41,6 @@ static void usage(void);
 static char text[BUFSIZ] = "";
 static int bh, mw, mh;
 static int inputw, promptw;
-static int lines = 0;
 static size_t cursor = 0;
 static const char *font = NULL;
 static const char *prompt = NULL;
@@ -49,6 +48,7 @@ static const char *normbgcolor = "#cccccc";
 static const char *normfgcolor = "#000000";
 static const char *selbgcolor  = "#0066ff";
 static const char *selfgcolor  = "#ffffff";
+static unsigned int lines = 0;
 static unsigned long normcol[ColLast];
 static unsigned long selcol[ColLast];
 static Atom utf8;