travis-ci: set v of nulK to 0

src/blua/lcode.c

@@ -270,6 +270,7 @@ static int boolK (FuncState *fs, int b) {
 
 static int nilK (FuncState *fs) {
   TValue k, v;
+  setbvalue(&v, 0);
   setnilvalue(&v);
   /* cannot use nil as key; instead use table itself to represent nil */
   sethvalue(fs->L, &k, fs->h);

src/sdl/i_main.c

@@ -245,7 +245,7 @@ int main(int argc, char **argv)
 #endif
 
 	// return to OS
-#if !defined (__GNUC__) || (__GNUC__ < 3)
+#if !defined (__GNUC__)
 	return 0;
 #endif
 }