increasing for loops are idiomatic
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slock.c
2
slock.c
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@ -274,7 +274,7 @@ lockscreen(Display *dpy, int screen)
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XDefineCursor(dpy, lock->win, invisible);
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/* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */
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for (i = 6, ptgrab = kbgrab = -1; i; --i) {
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for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) {
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if (ptgrab != GrabSuccess) {
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ptgrab = XGrabPointer(dpy, lock->root, False,
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ButtonPressMask | ButtonReleaseMask |
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