vis: improve :set option number parsing

Only accept numbers in range [0, INT_MAX]. Reject trailing garbage,
where before something like `:set cc 50NaN` worked it will now cause
an error.

Close #418

1 files changed, 0 insertions, 1 deletions

diff --git a/vis.h b/vis.h
index 1cf9725..4f1fd29 100644
--- a/vis.h
+++ b/vis.h
@@ -45,7 +45,6 @@ typedef struct {
 typedef union { /* various types of arguments passed to key action functions */
 	bool b;
 	int i;
-	size_t u;
 	const char *s;
 	const void *v;
 	void (*w)(View*);