Always use ANSI variants of Windows system functions.

src/lib_package.c

@@ -130,7 +130,7 @@ static const char *ll_bcsym(void *lib, const char *sym)
   if (lib) {
     return (const char *)GetProcAddress((HINSTANCE)lib, sym);
   } else {
-    HINSTANCE h = GetModuleHandle(NULL);
+    HINSTANCE h = GetModuleHandleA(NULL);
     const char *p = (const char *)GetProcAddress(h, sym);
     if (p == NULL && GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
 					(const char *)ll_bcsym, &h))

src/lj_alloc.c

@@ -91,7 +91,7 @@ static PNTAVM ntavm;
 
 static void INIT_MMAP(void)
 {
-  ntavm = (PNTAVM)GetProcAddress(GetModuleHandle("ntdll.dll"),
+  ntavm = (PNTAVM)GetProcAddress(GetModuleHandleA("ntdll.dll"),
 				 "NtAllocateVirtualMemory");
 }