fix: bad argument to apply_size_hints

[0x501D]

While in floating mode user can resize window to a zero width or height size. If this happens an error occures: bad argument 1 to apply_size_hints (value in [1, 65535] expected, got 0). After this error window size cannot be changed.

[codecov[bot]]

Codecov Report

Merging #2918 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #2918   +/-   ##
=======================================
  Coverage   87.55%   87.55%           
=======================================
  Files         610      610           
  Lines       42225    42225           
=======================================
  Hits        36972    36972           
  Misses       5253     5253

Flag	Coverage Δ
#gcov	76.06% <ø> (ø)	:arrow_up:
#luacov	90.19% <100%> (ø)	:arrow_up:

Impacted Files	Coverage Δ
lib/awful/placement.lua	91.56% <100%> (ø)	:arrow_up:

[psychon]

I guess this needs a test, but... how exactly does the patch work? This just skips size hints and alignment for when a window is resized to width or height zero? Shouldn't that still cause errors/issues later on?

[0x501D]

/This just skips size hints and alignment for when a window is resized to width or height zero?/ Exactly. /Shouldn't that still cause errors/issues later on?/ Unfortunately I cannot deep dig in architecture of awesome VM but on my local machine this patch fix the problem: an error goes away and window size can be changed back after window was resized to zero length (both direction was tested)