serprog.c: Retype variable `have_device` with bool

Use the bool type instead of an integer for the variable `have_device`,
since this represents its purpose much better.

Signed-off-by: Felix Singer <felixsinger@posteo.net>
Change-Id: Ia12f1503ae3f7be20a065f22b4ab84c4140cd23e
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66878
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
---
M serprog.c
1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/serprog.c b/serprog.c
index c68449a..57196a9 100644
--- a/serprog.c
+++ b/serprog.c
@@ -15,6 +15,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdbool.h>
 #include <stdio.h>
 #if ! IS_WINDOWS /* stuff (presumably) needed for sockets only */
 #include <stdlib.h>
@@ -571,7 +572,7 @@
 	unsigned char rbuf[3];
 	unsigned char c;
 	char *device;
-	int have_device = 0;
+	bool have_device = false;
 
 	/* the parameter is either of format "dev=/dev/device[:baud]" or "ip=ip:port" */
 	device = extract_programmer_param_str(cfg, "dev");
@@ -598,7 +599,7 @@
 				free(device);
 				return 1;
 			}
-			have_device++;
+			have_device = true;
 		}
 	}
 
@@ -637,7 +638,7 @@
 				free(device);
 				return 1;
 			}
-			have_device++;
+			have_device = true;
 		}
 	}
 	if (device && !strlen(device)) {

