BIND 10 master, updated. ddd815eb743887a54500fdd839e2de17571b1bf1 [master] fix clang static analyzer issue

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- Log -----------------------------------------------------------------
commit ddd815eb743887a54500fdd839e2de17571b1bf1
Author: JINMEI Tatuya <jinmei at isc.org>
Date:   Tue Dec 18 17:32:11 2012 -0600

    [master] fix clang static analyzer issue
    
    Value stored to 'opt_len' during its initialization is never read
    
    discussed via jabber
    
    also use const

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Summary of changes:
 tests/tools/perfdhcp/pkt_transform.cc |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

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diff --git a/tests/tools/perfdhcp/pkt_transform.cc b/tests/tools/perfdhcp/pkt_transform.cc
index b1c64e2..15f15f1 100644
--- a/tests/tools/perfdhcp/pkt_transform.cc
+++ b/tests/tools/perfdhcp/pkt_transform.cc
@@ -196,12 +196,10 @@ PktTransform::unpackOptions(const OptionBuffer& in_buffer,
 
         // Get option length which is supposed to be after option type.
         offset += offset_step;
-        uint16_t opt_len = in_buffer[offset] * 256 + in_buffer[offset + 1];
-        if (option->getUniverse() == Option::V6) {
-            opt_len = in_buffer[offset] * 256 + in_buffer[offset + 1];
-        } else {
-            opt_len = in_buffer[offset];
-        }
+        const uint16_t opt_len =
+            (option->getUniverse() == Option::V6) ?
+            in_buffer[offset] * 256 + in_buffer[offset + 1] :
+            in_buffer[offset];
 
         // Check if packet is not truncated.
         if (offset + option->getHeaderLen() + opt_len > in_buffer.size()) {