science/crf++: Fix build with Clang 6

feature_index.cpp:174:22: error: no matching function for call to 'make_pair'
      old2new.insert(std::make_pair<int, int>(it->second.first, new_maxid));
                     ^~~~~~~~~~~~~~~~~~~~~~~~

http://beefy11.nyi.freebsd.org/data/head-i386-default/p478276_s338342/logs/errors/crf++-0.54_1.log

1 files changed, 21 insertions, 0 deletions

diff --git a/science/crf++/files/patch-feature__index.cpp b/science/crf++/files/patch-feature__index.cpp
new file mode 100644
index 000000000000..042fafa6d42a
--- /dev/null
+++ b/science/crf++/files/patch-feature__index.cpp
@@ -0,0 +1,21 @@
+--- feature_index.cpp.orig	2018-09-01 10:26:57 UTC
++++ feature_index.cpp
+@@ -34,8 +34,7 @@ int EncoderFeatureIndex::getID(const char *key) {
+   std::map <std::string, std::pair<int, unsigned int> >::iterator
+       it = dic_.find(key);
+   if (it == dic_.end()) {
+-    dic_.insert(std::make_pair<std::string, std::pair<int, unsigned int> >
+-                (key, std::make_pair<int, unsigned int>(maxid_, 1)));
++    dic_.insert(std::make_pair(key, std::make_pair(maxid_, 1)));
+     int n = maxid_;
+     maxid_ += (key[0] == 'U' ? y_.size() : y_.size() * y_.size());
+     return n;
+@@ -171,7 +170,7 @@ void EncoderFeatureIndex::shrink(size_t freq) {
+     const std::string &key = it->first;
+ 
+     if (it->second.second >= freq) {
+-      old2new.insert(std::make_pair<int, int>(it->second.first, new_maxid));
++      old2new.insert(std::make_pair(it->second.first, new_maxid));
+       it->second.first = new_maxid;
+       new_maxid += (key[0] == 'U' ? y_.size() : y_.size() * y_.size());
+       ++it;