Fix some build issues.

Author: Y_Less

SDK/amxplugin.c

@@ -70,7 +70,7 @@ NUDE int AMXAPI amx_Allot(AMX *amx, int cells, cell *amx_addr, cell **phys_addr)
 	_asm jmp dword ptr [eax+PLUGIN_AMX_EXPORT_Allot*4];
 }
 
-NUDE int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params)
+NUDE int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, const cell *params)
 {
 	_asm mov eax, pAMXFunctions;
 	_asm jmp dword ptr [eax+PLUGIN_AMX_EXPORT_Callback*4];
@@ -344,7 +344,7 @@ int AMXAPI amx_Allot(AMX *amx, int cells, cell *amx_addr, cell **phys_addr)
 	return fn(amx, cells, amx_addr, phys_addr);
 }
 
-typedef int  AMXAPI (*amx_Callback_t)(AMX *amx, cell index, cell *result, cell *params);
+typedef int  AMXAPI (*amx_Callback_t)(AMX *amx, cell index, cell *result, const cell *params);
 int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params)
 {
 	amx_Callback_t fn = ((amx_Callback_t*)pAMXFunctions)[PLUGIN_AMX_EXPORT_Callback];

sscanf.cpp

@@ -121,7 +121,7 @@ static void *
 		NULL,                       // PLUGIN_AMX_EXPORT_UTF8Put
 };
 
-extern void *
+extern "C" void *
 	pAMXFunctions;
 
 extern unsigned int

sscanf.vcxproj

@@ -57,7 +57,7 @@
       <StringPooling>true</StringPooling>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
-      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader>
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
@@ -83,7 +83,7 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <PreprocessorDefinitions>HAVE_STDINT_H;WIN32;NDEBUG;_WINDOWS;_USRDLL;SSCANF_EXPORTS;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SmallerTypeCheck>false</SmallerTypeCheck>
-      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FloatingPointModel>Strict</FloatingPointModel>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>
       <PrecompiledHeader>