Fix typos

Found via  
```
codespell -q 3 -S *.js,*.po,./src/translator*,*.eps,./doc/changelog.doc -L ang,ans,attribs,ba,behaviour,classe,colour,german,iff,initialise,nam,nd,que,russian,statics,te,tim,uint
```

1 files changed, 1 insertions, 1 deletions

diff --git a/src/doxygen.cpp b/src/doxygen.cpp
index 953a5de..7fec2b6 100644
--- a/src/doxygen.cpp
+++ b/src/doxygen.cpp
@@ -2588,7 +2588,7 @@ static MemberDef *addVariableToFile(
           addMemberDocs(root,md,def,0,FALSE);
           md->setRefItems(root->sli);
           // if md is a variable forward declaration and root is the definition that
-          // turn md into the defintion
+          // turn md into the definition
           if (!root->explicitExternal && md->isExternal())
           {
             md->setDeclFile(md->getDefFileName(),md->getDefLine(),md->getDefColumn());