Lua: luaL_checkstring does not return NULL

Removed all checks for NULL strings to cleanup the code.

Change-Id: Ia890cd9b206296f586e85214f07765f14984580b
Reviewed-on: https://code.wireshark.org/review/4632
Tested-by: Stig Bjørlykke <stig@bjorlykke.org>
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>

1 files changed, 1 insertions, 8 deletions

diff --git a/epan/wslua/wslua_util.c b/epan/wslua/wslua_util.c
index ea53e6b542..d9c2766fdc 100644
--- a/epan/wslua/wslua_util.c
+++ b/epan/wslua/wslua_util.c
@@ -207,16 +207,9 @@ WSLUA_FUNCTION wslua_dofile(lua_State* L) {
     in the current directory it will look for it in wireshark's user and system directories. */
 #define WSLUA_ARG_dofile_FILENAME 1 /* Name of the file to be run. */
     const char *given_fname = luaL_checkstring(L, WSLUA_ARG_dofile_FILENAME);
-    char* filename;
+    char* filename = wslua_get_actual_filename(given_fname);
     int n;
 
-    if (!given_fname) {
-        WSLUA_ARG_ERROR(dofile,FILENAME,"must be a string");
-        return 0;
-    }
-
-    filename = wslua_get_actual_filename(given_fname);
-
     if (!filename) {
         WSLUA_ARG_ERROR(dofile,FILENAME,"file does not exist");
         return 0;