"Fix" SyncTERM MSVC build.

The sketchiest bit here is removing the uifc -> conio dependency
which, since it needs to depend on conio_sdl now means if something
is relying on that, it will need an explicity dependency...

We'll see what the pipeline says.

src/comio/comio.vcxproj

@@ -24,13 +24,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

src/conio/conio_sdl.vcxproj

@@ -14,6 +14,7 @@
     <ProjectGuid>{84592E48-27CA-48A6-B9C6-243D2347A578}</ProjectGuid>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="conio_sdl.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
@@ -154,6 +155,8 @@
     <ClCompile Include="sdlfuncs.c" />
     <ClCompile Include="sdl_con.c" />
     <ClCompile Include="SDL_win32_main.c" />
+    <ClCompile Include="syncicon64.c" />
+    <ClCompile Include="utf8_codepages.c" />
     <ClCompile Include="vidmodes.c">
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>

src/syncterm/SyncTERM.vcxproj

@@ -20,13 +20,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>

src/syncterm/st_crypt.c

 /* Copyright (C), 2007 by Stephen Hurd */
 
-#include <stdio.h> /* NULL */
 #ifdef _WIN32
+ #define WIN32_LEAN_AND_MEAN
  #include <stdlib.h>
 #else
  #include <unistd.h> /* _exit() */
 #endif
+#include <stdio.h> /* NULL */
 #include <xp_dl.h>
 
 #include "st_crypt.h"

src/uifc/uifc.vcxproj

@@ -124,11 +124,6 @@
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\conio\conio.vcxproj">
-      <Project>{84592e48-27ca-48a6-b9c6-243d2347a578}</Project>
-    </ProjectReference>
-  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>