--- a/src/dmlib.c	Thu Dec 08 15:56:36 2022 +0200
+++ b/src/dmlib.c	Thu Dec 08 15:59:22 2022 +0200
@@ -123,34 +123,34 @@
 }
 
 
-BOOL dmGetIntVal(const char *str, unsigned int *value, BOOL *neg)
+bool dmGetIntVal(const char *str, unsigned int *value, bool *neg)
 {
     int ch;
-    BOOL hex = FALSE;
+    bool hex = false;
 
     // Is the value negative?
     if (*str == '-')
     {
         if (neg == NULL)
-            return FALSE;
+            return false;
 
-        *neg = TRUE;
+        *neg = true;
         str++;
     }
     else
     if (neg != NULL)
-        *neg = FALSE;
+        *neg = false;
 
     // Is it hexadecimal?
     if (*str == '$')
     {
-        hex = TRUE;
+        hex = true;
         str++;
     }
     else
     if (str[0] == '0' && str[1] == 'x')
     {
-        hex = TRUE;
+        hex = true;
         str += 2;
     }
 
@@ -178,7 +178,7 @@
                 *value |= ch - 'a' + 10;
             }
             else
-                return FALSE;
+                return false;
         }
     }
     else
@@ -191,10 +191,10 @@
                 *value += ch - '0';
             }
             else
-                return FALSE;
+                return false;
         }
     }
-    return TRUE;
+    return true;
 }
 
 
@@ -351,7 +351,7 @@
                 if (!lock->used)
                 {
                     int res;
-                    lock->used = TRUE;
+                    lock->used = true;
                     lock->id = SDL_ThreadID();
                     lock->state++;
                     res = SDL_mutexP(mutex->m);