Remove unessecary semicolons from definitions of CMSG_NXTHDR.

(backport <#4492>)
(cherry picked from commit a2cf7c8)

Author: collinfunk

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -4662,7 +4662,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const crate::msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if cmsg.is_null() {
             return crate::CMSG_FIRSTHDR(mhdr);
-        };
+        }
         let next =
             cmsg as usize + _ALIGN((*cmsg).cmsg_len as usize) + _ALIGN(mem::size_of::<cmsghdr>());
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -2295,7 +2295,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const crate::msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if cmsg.is_null() {
             return crate::CMSG_FIRSTHDR(mhdr);
-        };
+        }
         let next =
             cmsg as usize + _ALIGN((*cmsg).cmsg_len as usize) + _ALIGN(mem::size_of::<cmsghdr>());
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;

src/unix/bsd/netbsdlike/openbsd/mod.rs

@@ -1869,7 +1869,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const crate::msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if cmsg.is_null() {
             return crate::CMSG_FIRSTHDR(mhdr);
-        };
+        }
         let next =
             cmsg as usize + _ALIGN((*cmsg).cmsg_len as usize) + _ALIGN(mem::size_of::<cmsghdr>());
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;

src/unix/haiku/mod.rs

@@ -1533,7 +1533,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if cmsg.is_null() {
             return crate::CMSG_FIRSTHDR(mhdr);
-        };
+        }
         let next = cmsg as usize
             + CMSG_ALIGN((*cmsg).cmsg_len as usize)
             + CMSG_ALIGN(mem::size_of::<cmsghdr>());

src/unix/hurd/mod.rs

@@ -3445,7 +3445,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if ((*cmsg).cmsg_len as usize) < mem::size_of::<cmsghdr>() {
             return core::ptr::null_mut::<cmsghdr>();
-        };
+        }
         let next = (cmsg as usize + CMSG_ALIGN((*cmsg).cmsg_len as usize)) as *mut cmsghdr;
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;
         if (next.offset(1)) as usize > max

src/unix/linux_like/emscripten/mod.rs

@@ -1367,7 +1367,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if ((*cmsg).cmsg_len as usize) < mem::size_of::<cmsghdr>() {
             return core::ptr::null_mut::<cmsghdr>();
-        };
+        }
         let next = (cmsg as usize + super::CMSG_ALIGN((*cmsg).cmsg_len as usize)) as *mut cmsghdr;
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;
         if (next.offset(1)) as usize > max {

src/unix/solarish/mod.rs

@@ -2422,7 +2422,7 @@ f! {
     pub fn CMSG_NXTHDR(mhdr: *const crate::msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
         if cmsg.is_null() {
             return crate::CMSG_FIRSTHDR(mhdr);
-        };
+        }
         let next =
             _CMSG_HDR_ALIGN(cmsg as usize + (*cmsg).cmsg_len as usize + size_of::<cmsghdr>());
         let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;