File has one fewer "}" than "{", however all seem matched.
Therefore, it is probably in a comment.
How do I search within a comment or otherwise find the missing brace?
I would recommend using a text editor such as Notepad++ which gives you syntax highlighting and parenthesis matching. Navigate to each bracket/parenthesis/brace, and it will highlight the matching one. This will help you find the missing character.
A simple trick to find unbalanced braces and parentheses in C and C++ files is to run GNU indent across them.
Throw away the output and only look at the warnings and errors produced, they will show unbalanced braces and parentheses also in dead code.
To do this across a source tree I use it like
find . -name "*.[ch]*"|xargs -n1 indent -st >/dev/null