fix(demo/vector_graphic): add missing buffer clear #5898
Merged
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Description of the feature or fix
For the memory obtained by malloc, it should be cleared first before starting drawing to avoid displaying garbage values.
cc @onecoolx
Before:
![image](https://private-user-images.githubusercontent.com/26767803/313622329-75ba50c7-d1a8-43e7-a8d3-282a34f2c356.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.yemiV0iAkff-PavguG5BBTmZW1uHLHyxe2ESzi05Da8)
After:
![image](https://private-user-images.githubusercontent.com/26767803/313622445-c922a09f-5d64-4d13-a355-a5b7848b1217.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.wbPflwVyEbEgi4RS1pwDoB5BPKX3MgnQXR9eN7quEsM)
Notes
lv_conf_template.h
run lv_conf_internal_gen.py and update Kconfig.scripts/code-format.py
(astyle version v3.4.10 needs to be installed) and follow the Code Conventions.