Fix build with older mingw

source/modules/hylia/Makefile

@@ -11,8 +11,12 @@ include ../Makefile.mk
 # ---------------------------------------------------------------------------------------------------------------------
 
 BUILD_CXX_FLAGS += $(HYLIA_FLAGS) -I$(CWD) -Ilink
-BUILD_CXX_FLAGS += -Wno-multichar -Wno-unused-parameter -Wno-unused-variable -Wno-uninitialized
-BUILD_CXX_FLAGS += -Wno-missing-field-initializers
+BUILD_CXX_FLAGS += -Wno-multichar
+BUILD_CXX_FLAGS += -Wno-unknown-pragmas
+# -Wno-unused-parameter
+# -Wno-unused-variable
+# -Wno-uninitialized
+# -Wno-missing-field-initializers
 
 # ---------------------------------------------------------------------------------------------------------------------
 

source/modules/hylia/mingw-std-threads/mingw.condition_variable.h

@@ -123,7 +123,7 @@ private:
         else
         {
             using namespace std;
-            throw system_error(make_error_code(errc::protocol_error));
+            throw system_error(make_error_code((errc)EPROTO));
         }
     }
 public: