Change all stderr to stdout

bmi-calc/main.nasm

@@ -5,7 +5,6 @@
 
 %define FD_stdin 0
 %define FD_stdout 1
-%define FD_stderr 2
 
 %define POLLIN 1
 
@@ -322,7 +321,7 @@ read_float_end:
 
 read_float_num_error:
     mov rax,SYS_write
-    mov rdi,FD_stderr
+    mov rdi,FD_stdout
     mov rsi,num_error_text
     mov rdx,num_error_length
     syscall
@@ -332,7 +331,7 @@ read_float_num_error:
 
 read_float_size_error:
     mov rax,SYS_write
-    mov rdi,FD_stderr
+    mov rdi,FD_stdout
     mov rsi,size_error_text
     mov rdx,size_error_length
     syscall