Fixed warning about casts between function pointers

gcc now warns (with -Wextra) about casts between pointers to different
function types. The type 'void(*)(void)' works as a 'void*' for function
pointers, cleaning the warning.

1 files changed, 8 insertions, 1 deletions

diff --git a/loadlib.c b/loadlib.c
index 9d86b158..ddfecca9 100644
--- a/loadlib.c
+++ b/loadlib.c
@@ -68,6 +68,13 @@ static const char *const CLIBS = "_CLIBS";
 
 
 /*
+** Special type equivalent to '(void*)' for functions in gcc
+** (to supress warnings when converting function pointers)
+*/
+typedef void (*voidf)(void);
+
+
+/*
 ** system-dependent functions
 */
 
@@ -206,7 +213,7 @@ static void *lsys_load (lua_State *L, const char *path, int seeglb) {
 
 
 static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
-  lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
+  lua_CFunction f = (lua_CFunction)(voidf)GetProcAddress((HMODULE)lib, sym);
   if (f == NULL) pusherror(L);
   return f;
 }