Fixed some includes and various non-critical issues

src/kernel/arch/i686/fdc.c

@@ -3,6 +3,7 @@
 #include "isr.h"
 #include "io.h"
 #include "../../lib/time.h"
+#include "../../lib/debug.h"
 
 static volatile bool g_fdc_irq = false;
 static int g_curr_drive = 0;

src/kernel/drivers/keyboard.c

@@ -5,7 +5,6 @@
 #include "../lib/stdio.h"
 #include "../arch/i686/io.h"
 #include "../lib/stdio.h"
-#include "../shell.h"
 #include "../lib/debug.h"
 
 static bool g_caps_lock = false;

src/kernel/main.c

@@ -9,6 +9,7 @@
 #include "multiboot.h"
 #include "lib/debug.h"
 #include "arch/i686/fdc.h"
+#include "shell.h"
 
 extern uint8_t end; // Kernel end
 

src/kernel/shell.c

@@ -43,7 +43,7 @@ int shell_run(char *cmd){
                 }
                 i += 128;
                 printf("\nPress enter to continue\n");
-                gets(NULL, NULL);
+                gets(NULL, 0);
             }
         }
         else{