Workaround missing %hhx support in MinGW sscanf

MinGW uses standard Windows C libraries and those apparently don't
support %hhx for sscanf into a uint8_t. SCNx8 isn't available either.

Corresponding to flashrom svn r1495.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Idwer Vollering <vidwer@gmail.com>

dummyflasher.c

@@ -199,7 +199,12 @@ int dummy_init(void)
 			}
 		}
 		for (i = 0; i < spi_blacklist_size; i++) {
-			sscanf(tmp + i * 2, "%2hhx", &spi_blacklist[i]);
+			unsigned int tmp2;
+			/* SCNx8 is apparently not supported by MSVC (and thus
+			 * MinGW), so work around it with an extra variable
+			 */
+			sscanf(tmp + i * 2, "%2x", &tmp2);
+			spi_blacklist[i] = (uint8_t)tmp2;
 		}
 		msg_pdbg("SPI blacklist is ");
 		for (i = 0; i < spi_blacklist_size; i++)
@@ -230,7 +235,12 @@ int dummy_init(void)
 			}
 		}
 		for (i = 0; i < spi_ignorelist_size; i++) {
-			sscanf(tmp + i * 2, "%2hhx", &spi_ignorelist[i]);
+			unsigned int tmp2;
+			/* SCNx8 is apparently not supported by MSVC (and thus
+			 * MinGW), so work around it with an extra variable
+			 */
+			sscanf(tmp + i * 2, "%2x", &tmp2);
+			spi_ignorelist[i] = (uint8_t)tmp2;
 		}
 		msg_pdbg("SPI ignorelist is ");
 		for (i = 0; i < spi_ignorelist_size; i++)