Fix FTBFS due to unnamed unused arguments in C sources in a recent commit.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 1b2d3b15f4)

kdeprint/driverparse.c

@@ -280,7 +280,7 @@ int getMaticPrinterInfos(const char *base, const char *id, char *make, char *mod
 	return 1;
 }
 
-int parseMaticFile(const char *driver, const char * /*origin*/, const char * /*metadata*/, FILE *output)
+int parseMaticFile(const char *driver, const char * UNUSED(origin), const char * UNUSED(metadata), FILE *output)
 {
 	FILE	*drFile;
 	char	name[32] = {0},

kdeprint/driverparse.h

@@ -23,6 +23,14 @@
 
 #include <stdio.h>
 
+#if !defined(UNUSED)
+#  if defined(__GNUC__) && ( __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4) )
+#    define UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
+#  else
+#    define UNUSED(x) UNUSED_ ## x
+#  endif
+#endif
+
 void registerHandler(const char *name, void(*initf)(const char*), int(*parsef)(const char*, const char*, const char*, FILE*));
 void initFoomatic(void);
 int execute(int argc, char *argv[]);

kdeprint/lpr/make_driver_db_lpr.c

@@ -47,7 +47,7 @@ void simplifyModel(const char *modelname)
 	}
 }
 
-int parseApsFile(const char *filename, const char * /*origin*/, const char * /*metadata*/, FILE *output)
+int parseApsFile(const char *filename, const char * UNUSED(origin), const char * UNUSED(metadata), FILE *output)
 {
 	FILE	*apsfile;
 	char	buf[256], modelname[256];
@@ -127,7 +127,7 @@ char* nextWord(char *c)
 	return d;
 }
 
-int parseIfhpFile(const char *filename, const char * /*origin*/, const char * /*metadata*/, FILE *output)
+int parseIfhpFile(const char *filename, const char * UNUSED(origin), const char * UNUSED(metadata), FILE *output)
 {
 	char	buf[1024];
 	FILE	*in;