[PATCH-for-5.0] target/m68k/helper: Fix m68k_fpu_gdb_get_reg() use of GByteArray

[Philippe Mathieu-Daudé]

Since a010bdbe719 the gdbstub API takes a GByteArray*.
Unfortunately we forgot to update the gdb_get_reg*()
calls.  Do it now.

Fixes: a010bdbe719 ("extend GByteArray to read register helpers")
Reported-by: Peter Xu <pet...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
Based-on: <20200409164954.36902-1-pet...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
 target/m68k/helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index 014657c637..cad4083895 100644
--- a/target/m68k/helper.c
+++ b/target/m68k/helper.c
@@ -109,8 +109,8 @@ static int m68k_fpu_gdb_get_reg(CPUM68KState *env, 
GByteArray *mem_buf, int n)
 {
     if (n < 8) {
         int len = gdb_get_reg16(mem_buf, env->fregs[n].l.upper);
-        len += gdb_get_reg16(mem_buf + len, 0);
-        len += gdb_get_reg64(mem_buf + len, env->fregs[n].l.lower);
+        len += gdb_get_reg16(mem_buf, 0);
+        len += gdb_get_reg64(mem_buf, env->fregs[n].l.lower);
         return len;
     }
     switch (n) {
-- 
2.21.1