Another batch of warning fixes, including several for gcc -Wparentheses

src/core/haval.cpp

@@ -76,6 +76,9 @@
  *	- byte-order is discovered at compile time.  we use the information
  *		in "../../include/byteorder.h" to get this information.
  */
+
+#pragma GCC diagnostic ignored "-Wparentheses"
+
 #include "stdcore.h"
 #include "config.h"
 #include <stdio.h>

src/core/msystem.cpp

@@ -619,7 +619,7 @@ char *cmd;
 #endif
 {
 	const char *argv[5];			/* argument list */
-	register char *p;		/* temoporary pointers */
+	register const char *p;		/* temoporary pointers */
 	register const char* shptr;		/* the program to be run */
 	register int i;			/* index number of child */
 
@@ -672,7 +672,7 @@ char *mode;
 #endif
 {
 	const char *argv[5];			/* argument list */
-	register char *p;		/* temoporary pointers */
+	register const char *p;		/* temoporary pointers */
 	register const char *shptr;		/* the program to be run */
 	FILE *fpa[3];			/* process communication descriptors */
 	register int indx;		/* index number of child */
@@ -759,7 +759,7 @@ FILE *fpa[];
 #endif
 {
 	const char *argv[5];			/* argument list */
-	register char *p;		/* temoporary pointers */
+	register const char *p;		/* temoporary pointers */
 	register const char *shptr;		/* the program to be run */
 	register int indx;		/* index number of child */
 

src/cryptlib/sha.cpp

@@ -83,8 +83,8 @@ void SHA::Final(byte *hash)
    for this information */
 
 #ifdef NEW_SHA
-  #define expand(W,i) ( W[ i & 15 ] = rotl( (W[i&15] ^ W[i-14&15] ^ \
-											 W[i-8&15] ^ W[i-3&15]), 1U) )
+  #define expand(W,i) ( W[ i & 15 ] = rotl( (W[i&15] ^ W[(i-14)&15] ^ \
+											 W[(i-8)&15] ^ W[(i-3)&15]), 1U) )
 #else
   #define expand(W,i) ( W[ i & 15 ] ^= W[ i - 14 & 15 ] ^ W[ i - 8 & 15 ] ^ W[ i - 3 & 15 ] )
 #endif /* NEW_SHA */