compile with -pedantic option and fix warnings

src/Makefile

@@ -2,7 +2,7 @@ sources := $(wildcard *.cc)
 objects := $(addprefix ., $(sources:.cc=.o))
 deps := $(addprefix ., $(sources:.cc=.d))
 
-CXXFLAGS += -std=c++11 -g -Wall -Wno-reorder -Wno-sign-compare
+CXXFLAGS += -std=c++11 -g -Wall -Wno-reorder -Wno-sign-compare -pedantic
 LIBS += -lmenu -lncursesw -lboost_regex
 
 debug ?= yes

src/dynamic_selection_list.hh

@@ -25,7 +25,7 @@ private:
                   const BufferIterator& end) override;
 };
 
-};
+}
 
 #endif // dynamic_selection_list_hh_INCLUDED
 

src/highlighters.cc

@@ -196,7 +196,7 @@ HighlighterAndId highlight_search_factory(const HighlighterParameters params, co
     {
         throw runtime_error(String("regex error: ") + err.what());
     }
-};
+}
 
 HighlighterAndId highlight_regex_option_factory(const HighlighterParameters params, const Window& window)
 {
@@ -211,7 +211,7 @@ HighlighterAndId highlight_regex_option_factory(const HighlighterParameters para
 
     auto get_regex = [option_name, &options]{ return options[option_name].get<Regex>(); };
     return {"hloption_" + option_name, DynamicRegexHighlighter<decltype(get_regex)>{colors, get_regex}};
-};
+}
 
 void expand_tabulations(const OptionManager& options, DisplayBuffer& display_buffer)
 {

src/remote.cc

@@ -53,7 +53,7 @@ public:
     void write(const T& val)
     {
         write((const char*)&val, sizeof(val));
-    };
+    }
 
     void write(const String& str)
     {
@@ -67,7 +67,7 @@ public:
         write<uint32_t>(view.size());
         for (auto& val : view)
             write(val);
-    };
+    }
 
     template<typename T>
     void write(const std::vector<T>& vec)
@@ -119,7 +119,7 @@ T read(int socket)
     char value[sizeof(T)];
     read(socket, value, sizeof(T));
     return *(T*)(value);
-};
+}
 
 template<>
 String read<String>(int socket)
@@ -131,7 +131,7 @@ String read<String>(int socket)
     assert(length < 2048);
     read(socket, buffer, (int)length);
     return String(buffer, buffer+(int)length);
-};
+}
 
 template<typename T>
 std::vector<T> read_vector(int socket)
@@ -142,7 +142,7 @@ std::vector<T> read_vector(int socket)
     while (size--)
         res.push_back(read<T>(socket));
     return res;
-};
+}
 
 template<>
 DisplayAtom read<DisplayAtom>(int socket)