errors when saving c file

[gumacahin]

This happen only when I'm editing c source files.

Error detected while processing function 28_UpdateErrors..28_CacheErrors..SyntaxCheckers_c_GetLocList:
line 16:
E117: Unknown function: syntastic#c#GetIncludeDirs
E15: Invalid expression: ' '.shellescape(expand('%')). ' '.syntastic#c#GetIncludeDirs('c')
line 55:
E117: Unknown function: syntastic#c#ReadConfig