checkpatch: Fix extraneous EXPORT_SYMBOL* warnings

These are caused by checkpatch incorrectly parsing its internal representation of a statement block for struct's (or anything else that is a statement block encapsulated in {}'s that also ends with a ';'). Fix this by properly parsing a statement block.

An example:

	diff --git a/dummy.c b/dummy.c
	new file mode 100644
	index 0000000..3a932a5
	--- /dev/null
	+++ b/dummy.c
	@@ -0,0 +1,12 @@
	+struct dummy_type dummy = {
	+	.foo	= "baz",
	+};
	+EXPORT_SYMBOL_GPL(dummy);
	+
	+static int dummy_func(void)
	+{
	+	return -EDUMMYCODE;
	+}
	+EXPORT_SYMBOL_GPL(dummy_func);

	WARNING: EXPORT_SYMBOL(foo); should immediately \
		follow its function/variable
	#19: FILE: dummy.c:4:
	+EXPORT_SYMBOL_GPL(dummy);

The above warning is issued when it should not be.

---
 scripts/checkpatch.pl |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

index bd88f11..6affee2 100755
@@ -552,6 +552,9 @@ sub ctx_statement_block {
 			$type = ($level != 0)? '{' : '';
 
 			if ($level == 0) {
+				if (substr($blk, $off + 1, 1) eq ';') {
+					$off++;
+				}
 				last;
 			}
 		}

1.7.2