[OS X TeX] how to automatically save before compiling?

[Jiajun Wang]

Hi, I wish some one could help. I am using vim + latex-suite + texshop.
The trouble is when compile, vim + latex-suite will not save the file  
first and then compile.
So the result is that the output is not updated after compiling.
Does anyone know how to set this up? I mean let vim + latex-suite  
save the tex file first before compiling? Thanks
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