[master] use prefix version of ++, pointed out by cppcheck.

should be sufficiently trivial, directly committing to master.

src/bin/auth/tests/query_unittest.cc

@@ -201,7 +201,7 @@ MockZone::find(const Name& name, const RRType& type,
         // If not found but we have a target, fill it with all RRsets here
         if (!found_domain->second.empty() && target != NULL) {
             for (found_rrset = found_domain->second.begin();
-                 found_rrset != found_domain->second.end(); found_rrset++) {
+                 found_rrset != found_domain->second.end(); ++found_rrset) {
                 // Insert RRs under the domain name into target
                 target->addRRset(
                     boost::const_pointer_cast<RRset>(found_rrset->second));

src/lib/datasrc/data_source.cc

@@ -1157,7 +1157,7 @@ MetaDataSrc::addDataSrc(ConstDataSrcPtr data_src) {
 void
 MetaDataSrc::removeDataSrc(ConstDataSrcPtr data_src) {
     std::vector<ConstDataSrcPtr>::iterator it, itr;
-    for (it = data_sources.begin(); it != data_sources.end(); it++) {
+    for (it = data_sources.begin(); it != data_sources.end(); ++it) {
         if (*it == data_src) {
             itr = it;
         }

src/lib/datasrc/memory_datasrc.cc

@@ -515,7 +515,7 @@ struct MemoryZone::MemoryZoneImpl {
         if (target != NULL && !node->getData()->empty()) {
             // Empty domain will be handled as NXRRSET by normal processing
             for (found = node->getData()->begin();
-                 found != node->getData()->end(); found++)
+                 found != node->getData()->end(); ++found)
             {
                 target->addRRset(
                     boost::const_pointer_cast<RRset>(prepareRRset(name,