c: Fix missing wvtest.h declarations to avoid warnings.
treebd5c6265d373adecc7e03aecb6a4df768d34b368
-rw-r--r-- 53 .gitignore
-rw-r--r-- 25265 LICENSE
-rw-r--r-- 525 Makefile
-rw-r--r-- 17256 README
drwxr-xr-x - c
drwxr-xr-x - cpp
drwxr-xr-x - dotnet
drwxr-xr-x - javascript
drwxr-xr-x - python
-rwxr-xr-x 306 runnable
-rw-r--r-- 356 sample-error
-rw-r--r-- 341 sample-ok
drwxr-xr-x - sh
-rwxr-xr-x 4740 wvtestrun