Actually add the bool check this time

This reverts commit 7ad41ef827.

src/agg.c

@@ -5,6 +5,21 @@
 #include <stdlib.h>
 #include <string.h>
 
+int isbool(char entered []) {
+    int valid = 1;
+    for (int i = 0; i < strlen(entered); i++) {
+        switch (entered[i]) {
+        case '0':
+        case '1':
+            break;
+        default:
+            valid = 0;
+            break;
+        }
+    }
+    return valid;
+}
+
 int isvalidnumber(char entered []) {
     int valid = 1;
     for (int i = 0; i < strlen(entered); i++) {
@@ -44,7 +59,7 @@ int main(void) {
 
   printf ("Hello %s!\nThis is a game written for AgnoxGD.\nWould you like to see a tutorial\nType 1 for no, or 0 for yes.\n", username);
   scanf("%s", input);
-  if (isvalidnumber(input)) {
+  if (isbool(input)) {
     sscanf(input, "%d", &tempInput);
     tutorial = tempInput;
   } else {
@@ -60,7 +75,7 @@ int main(void) {
   printf ("\nWould you like your accuracy as a float or as an int? Type 0 for float or 1 for int.\n");
    scanf ("%s", input);
 
-  if (isvalidnumber(input)) {
+  if (isbool(input)) {
     sscanf(input, "%d", &accuracytype);
     } else {
     printf ("Error! An invalid character was entered.\n");