crypto/{gc-rijndael,rijndael} tests: Fix some gcc -Wshadow warnings

[Bruno Haible]

These gcc warnings are justified:

test-gc-rijndael.c:70:16: warning: declaration of 'i' shadows a previous local 
[-Wshadow=compatible-local]
test-gc-rijndael.c:93:16: warning: declaration of 'i' shadows a previous local 
[-Wshadow=compatible-local]
test-gc-rijndael.c:147:16: warning: declaration of 'i' shadows a previous local 
[-Wshadow=compatible-local]
test-rijndael.c:61:14: warning: declaration of 'i' shadows a previous local 
[-Wshadow=compatible-local]
test-rijndael.c:92:14: warning: declaration of 'i' shadows a previous local 
[-Wshadow=compatible-local]

It makes the code clearer when different variable names are used for different
purposes.


2023-09-04  Bruno Haible  <br...@clisp.org>

        crypto/{gc-rijndael,rijndael} tests: Fix some gcc -Wshadow warnings.
        * tests/test-gc-rijndael.c (main): Rename local variable 'i' to 'round'.
        * tests/test-rijndael.c (main): Likewise.

diff --git a/tests/test-gc-rijndael.c b/tests/test-gc-rijndael.c
index 2439d89201..ba014d7bf3 100644
--- a/tests/test-gc-rijndael.c
+++ b/tests/test-gc-rijndael.c
@@ -43,7 +43,7 @@ main (int argc, char *argv[])
     char ct[] = "\xC3\x4C\x05\x2C\xC0\xDA\x8D\x73"
       "\x45\x1A\xFE\x5F\x03\xBE\x29\x7F";
     gc_cipher_handle ctx;
-    size_t i;
+    size_t round;
 
     rc = gc_cipher_open (GC_AES128, GC_ECB, &ctx);
     if (rc != GC_OK)
@@ -55,7 +55,7 @@ main (int argc, char *argv[])
 
     memcpy (buf, pt, 16);
 
-    for (i = 0; i < 10000; i++)
+    for (round = 0; round < 10000; round++)
       {
         rc = gc_cipher_encrypt_inline (ctx, 16, buf);
         if (rc != GC_OK)
@@ -78,7 +78,7 @@ main (int argc, char *argv[])
         return 1;
       }
 
-    for (i = 0; i < 10000; i++)
+    for (round = 0; round < 10000; round++)
       {
         rc = gc_cipher_decrypt_inline (ctx, 16, buf);
         if (rc != GC_OK)
@@ -116,7 +116,7 @@ main (int argc, char *argv[])
     char ct[] = "\x66\xe9\x4b\xd4\xef\x8a\x2c\x3b"
       "\x88\x4c\xfa\x59\xca\x34\x2b\x2e";
     gc_cipher_handle ctx;
-    size_t i;
+    size_t round;
 
     rc = gc_cipher_open (GC_AES128, GC_CBC, &ctx);
     if (rc != GC_OK)
@@ -132,7 +132,7 @@ main (int argc, char *argv[])
 
     memcpy (buf, pt, 16);
 
-    for (i = 0; i < 10000; i++)
+    for (round = 0; round < 10000; round++)
       {
         rc = gc_cipher_encrypt_inline (ctx, 16, buf);
         if (rc != GC_OK)
diff --git a/tests/test-rijndael.c b/tests/test-rijndael.c
index b77ba66425..30b3d5ce50 100644
--- a/tests/test-rijndael.c
+++ b/tests/test-rijndael.c
@@ -34,7 +34,7 @@ main (int argc, char *argv[])
     "\x00\x00\x00\x00\x00\x00\x00\x00";
   char ct[] = "\xC3\x4C\x05\x2C\xC0\xDA\x8D\x73"
     "\x45\x1A\xFE\x5F\x03\xBE\x29\x7F";
-  size_t i;
+  size_t round;
 
   rc = rijndaelMakeKey (&key, RIJNDAEL_DIR_ENCRYPT,
                         128, "00000000000000000000000000000000");
@@ -47,7 +47,7 @@ main (int argc, char *argv[])
 
   memset (in, 0, RIJNDAEL_BITSPERBLOCK / 8);
 
-  for (i = 0; i < 10000; i++)
+  for (round = 0; round < 10000; round++)
     {
       rc = rijndaelBlockEncrypt (&cipher, &key, in, 128, out);
       if (rc < 0)
@@ -78,7 +78,7 @@ main (int argc, char *argv[])
   if (rc != 0)
     printf ("cipherInit failed %d\n", rc);
 
-  for (i = 0; i < 10000; i++)
+  for (round = 0; round < 10000; round++)
     {
       memcpy (in, out, RIJNDAEL_BITSPERBLOCK / 8);