Fix array bounds; that caused a segfault while storing the configuration file,
also ensure EOF is properly matched on archs where char is unsigned (ppc, arm)

Index: src/xtermset.c
--- src/xtermset.c.orig
+++ src/xtermset.c
@@ -33,8 +33,8 @@
 
 int main(int argc, char *argv[])
 {
-    int i,style,code,switches[2];
-    char fn[2][MAXFNCHARS-1],c,*tok;
+    int i,c,style,code,switches[3];
+    char fn[3][MAXFNCHARS-1],*tok;
     char line[MAXOPTCHARS+10]; /* ? */
     FILE *rcfile=NULL;
     argument *argptr = NULL;