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Change name of ISNODELOG to ISNODECMP

ISNODELOG stand for "is node logical", but it was not a good
mnemonic. ISNODECMP stands for "is node comparision", and it is
a better mnemonic, but is not true, because it is also true for
logical and and logical or. We are going to use ISNODECMP
because is more legible.

--- a/cc1.h

+++ b/cc1.h

@@ -221,7 +221,7 @@

 #define TYP(s) ((union unode) {.type = s})

 #define ISNODESYM(n) ((n)->code == emitsym)

 #define ISNODEBIN(n) ((n)->code == emitbin)

-#define ISNODELOG(n) (ISNODEBIN(n) && (n)->u.op & 0x40)

+#define ISNODECMP(n) (ISNODEBIN(n) && (n)->u.op & 0x40)

 extern Node *expr(void);

 extern void extdecl(void), decl(void), compound(void);

--- a/expr.c

+++ b/expr.c

@@ -241,7 +241,7 @@

 static Node *

 exp2cond(Node *np, char neg)

 {

-	if (ISNODELOG(np)) {

+	if (ISNODECMP(np)) {

 			np->u.op ^= neg;

 			return np;

 	}

@@ -288,7 +288,7 @@

 static Node *

 iszero(Node *np)

 {

-	if (ISNODELOG(np))

+	if (ISNODECMP(np))

 		return np;

 	return compare(ONE, np, constcode(zero));

 }

@@ -296,7 +296,7 @@

 static Node *

 eval(Node *np)

 {

-	if (!ISNODELOG(np))

+	if (!ISNODECMP(np))

 		return np;

 	return ternarycode(np, constcode(one), constcode(zero));

 }