Show less error when trying to load a non-exist type

[lebr0nli]

Show less error when trying to load a non-exist type, because seems like the user doesn't need that much information when loading a non-exist type.

Before:

After:

[codecov-commenter]

Codecov Report

Merging #1171 (46babfd) into dev (3b2f779) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev    #1171      +/-   ##
==========================================
+ Coverage   52.67%   52.69%   +0.01%     
==========================================
  Files         178      178              
  Lines       20044    20043       -1     
  Branches     1837     1837              
==========================================
+ Hits        10558    10561       +3     
+ Misses       9077     9074       -3     
+ Partials      409      408       -1     

Impacted Files	Coverage Δ
pwndbg/gdblib/typeinfo.py	53.84% <0.00%> (+0.51%)	⬆️
pwndbg/stack.py	76.92% <0.00%> (+4.61%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.