GCC-13 support, when precompiled headers are off

src/common/utility/engineerrors.cpp

@@ -35,8 +35,9 @@
 
 bool gameisdead;
 
-#ifdef _WIN32
 #include <cstdarg>
+
+#ifdef _WIN32
 #include <windows.h>
 #include "zstring.h"
 void I_DebugPrint(const char *cp)

src/common/utility/palette.cpp

@@ -33,6 +33,8 @@
 */
 
 #include <algorithm>
+#include <cfloat>
+#include <cmath>
 #include "palutil.h"
 #include "palentry.h"
 #include "sc_man.h"

src/common/utility/writezip.cpp

@@ -39,6 +39,7 @@
 #include "files.h"
 #include "m_swap.h"
 #include "w_zip.h"
+#include "fs_decompress.h"
 
 using FileSys::FCompressedBuffer;