target-i386: Fix compiler warning

With argument checking for cpu_fprintf, gcc throws this warning:

  CC    i386-softmmu/helper.o
cc1: warnings being treated as errors
/qemu/ar7/target-i386/helper.c: In function ‘cpu_x86_dump_seg_cache’:
/qemu/ar7/target-i386/helper.c:220: error: format not a string literal and no format arguments

The code is correct, but current gcc versions don't detect this.
Therefore the patch rewrites the statement to satisfy the compiler.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

target-i386/helper.c

@@ -214,9 +214,10 @@ cpu_x86_dump_seg_cache(CPUState *env, FILE *f,
                 "Reserved", "IntGate64", "TrapGate64"
             }
         };
-        cpu_fprintf(f, sys_type_name[(env->hflags & HF_LMA_MASK) ? 1 : 0]
-                                    [(sc->flags & DESC_TYPE_MASK)
-                                     >> DESC_TYPE_SHIFT]);
+        cpu_fprintf(f, "%s",
+                    sys_type_name[(env->hflags & HF_LMA_MASK) ? 1 : 0]
+                                 [(sc->flags & DESC_TYPE_MASK)
+                                  >> DESC_TYPE_SHIFT]);
     }
 done:
     cpu_fprintf(f, "\n");