replace antiquated C syntax constructs for function declarations

Signed-off-by: Fabian Groffen <grobian@gentoo.org>

--- pwgen-2.08/randnum.c	2017-08-07 06:36:54.000000000 +0200
+++ pwgen-2.08/randnum.c	2023-04-20 14:46:50.107904416 +0200
@@ -43,8 +43,7 @@
  * Generate a random number n, where 0 <= n < max_num, using
  * /dev/urandom if possible.
  */
-int pw_random_number(max_num)
-	int max_num;
+int pw_random_number(int max_num)
 {
 	unsigned int rand_num;
 	int i, fd = get_random_fd();
--- pwgen-2.08/sha1.c	2007-07-04 23:39:35.000000000 +0200
+++ pwgen-2.08/sha1.c	2023-04-20 14:48:25.048635027 +0200
@@ -42,8 +42,7 @@
     (b)[(i) + 3] = (uint8) ( (n)       );       \
 }
 
-void sha1_starts(ctx)
-	sha1_context *ctx;
+void sha1_starts(sha1_context *ctx)
 {
     ctx->total[0] = 0;
     ctx->total[1] = 0;
@@ -55,9 +54,7 @@
     ctx->state[4] = 0xC3D2E1F0;
 }
 
-void sha1_process(ctx, data)
-	sha1_context *ctx;
-	uint8 data[64];
+void sha1_process(sha1_context *ctx, uint8 data[64])
 {
     uint32 temp, W[16], A, B, C, D, E;
 
@@ -213,10 +210,7 @@
     ctx->state[4] += E;
 }
 
-void sha1_update(ctx, input, length )
-	sha1_context *ctx;
-	uint8 *input;
-	uint32 length;
+void sha1_update(sha1_context *ctx, uint8 *input, uint32 length)
 {
     uint32 left, fill;
 
@@ -263,9 +257,7 @@
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 };
 
-void sha1_finish( ctx, digest )
-	sha1_context *ctx;
-	uint8 digest[20];
+void sha1_finish(sha1_context *ctx, uint8 digest[20])
 {
     uint32 last, padn;
     uint32 high, low;