Merge pull request #832 from Blizzard/fix-compiler-warnings

Fix a few compiler warnings

contrib/lua/src/lauxlib.c

@@ -673,7 +673,7 @@ static int skipBOM (LoadF *lf) {
   do {
     c = getc(lf->f);
     if (c == EOF || c != *(const unsigned char *)p++) return c;
-    lf->buff[lf->n++] = c;  /* to be read by the parser */
+    lf->buff[lf->n++] = (char)c;  /* to be read by the parser */
   } while (*p != '\0');
   lf->n = 0;  /* prefix matched; discard it */
   return getc(lf->f);  /* return next character */
@@ -723,7 +723,7 @@ LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
     skipcomment(&lf, &c);  /* re-read initial portion */
   }
   if (c != EOF)
-    lf.buff[lf.n++] = c;  /* 'c' is the first character of the stream */
+    lf.buff[lf.n++] = (char)c;  /* 'c' is the first character of the stream */
   status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode);
   readstatus = ferror(lf.f);
   if (filename) fclose(lf.f);  /* close file (even in case of errors) */

src/host/os_getcwd.c

@@ -28,7 +28,7 @@ int do_getcwd(char* buffer, size_t size)
 
 	result = (GetCurrentDirectoryW(PATH_MAX, wbuffer) != 0);
 	if (result) {
-		WideCharToMultiByte(CP_UTF8, 0, wbuffer, -1, buffer, size, NULL, NULL);
+		WideCharToMultiByte(CP_UTF8, 0, wbuffer, -1, buffer, (int)size, NULL, NULL);
 
 		do_translate(buffer, '/');
 	}

src/host/premake.h

@@ -9,6 +9,8 @@
 #include "lauxlib.h"
 #include "lualib.h"
 
+#include <stdlib.h>
+
 #define PREMAKE_VERSION        "5.0.0-dev"
 #define PREMAKE_COPYRIGHT      "Copyright (C) 2002-2017 Jason Perkins and the Premake Project"
 #define PREMAKE_PROJECT_URL    "https://github.com/premake/premake-core/wiki"
@@ -48,7 +50,6 @@
 #if PLATFORM_WINDOWS
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
-#include <stdlib.h>
 #else
 #include <unistd.h>
 #endif

src/host/string_hash.c

@@ -11,8 +11,8 @@
 int string_hash(lua_State* L)
 {
 	const char* str = luaL_checkstring(L, 1);
-	unsigned long seed = luaL_optnumber(L, 2, 0);
-	lua_pushnumber(L, (lua_Number)do_hash(str, seed));
+	int seed = (int)luaL_optinteger(L, 2, 0);
+	lua_pushinteger(L, do_hash(str, seed));
 	return 1;
 }