linux-user/sh4: fix incorrect memory write

not hit since 2009! :)

linux-user/elfload.c:1102:20: warning: Out of bound memory access (access exceeds upper limit of memory block)
        (*regs[i]) = tswap32(env->gregs[i]);
        ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Clang Static Analyzer
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NLaurent Vivier <laurent@vivier.eu>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

linux-user/elfload.c

@@ -1099,7 +1099,7 @@ static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
     int i;
 
     for (i = 0; i < 16; i++) {
-        (*regs[i]) = tswapreg(env->gregs[i]);
+        (*regs)[i] = tswapreg(env->gregs[i]);
     }
 
     (*regs)[TARGET_REG_PC] = tswapreg(env->pc);