made popping with lists work. yay! (also new demo to show the thing)

demo.c

@@ -1,4 +1,5 @@
 #include <odweta/list.h>
+#include <stdio.h>
 
 int main(int argc, char **argv) {
 	list_t *l = listInit();
@@ -9,6 +10,27 @@ int main(int argc, char **argv) {
 
 	listPrint(l);
 
+	printf("popping for the 1st time\n");
+	int popped = *((int *)listPop(l));
+
+	printf("popped: %d\n", popped);
+
+	listPrint(l);
+
+	printf("popping for the 2nd time\n");
+	char cpopped = *((char *)listPop(l));
+
+	printf("popped: '%c'\n", cpopped);
+
+	listPrint(l);
+
+	printf("popping for the 3rd time\n");
+	float fpopped = *((float *)listPop(l));
+
+	printf("popped: %f\n", fpopped);
+
+	listPrint(l);
+
 	listCleanup(l);
 
 	return 0;