qemu: fix -global argument usage

* src/qemu/qemu_command.c (qemuBuildCommandLine): Pass two
separate arguments, and fix indentation.

src/qemu/qemu_command.c

@@ -4042,11 +4042,12 @@ qemuBuildCommandLine(virConnectPtr conn,
                 if (def->videos[0]->type == VIR_DOMAIN_VIDEO_TYPE_QXL) {
                     if (def->videos[0]->vram &&
                         qemuCapsGet(qemuCaps, QEMU_CAPS_DEVICE)) {
+                        virCommandAddArg(cmd, "-global");
                         if (qemuCapsGet(qemuCaps, QEMU_CAPS_DEVICE_QXL_VGA))
-                                virCommandAddArgFormat(cmd, "-global qxl-vga.vram_size=%u",
+                            virCommandAddArgFormat(cmd, "qxl-vga.vram_size=%u",
                                                    def->videos[0]->vram * 1024);
                         else
-                                virCommandAddArgFormat(cmd, "-global qxl.vram_size=%u",
+                            virCommandAddArgFormat(cmd, "qxl.vram_size=%u",
                                                    def->videos[0]->vram * 1024);
                     }
                 }