Eliminate unused spec argument from parseExpressionBoolean()

- Its never been used beyond assignment to the internal state struct,
  so in reality this is entirely free of any rpmbuild-specifics.
  Meaning we could trivially lift it to librpmio for macros...
- No functional changes here

build/expression.c

@@ -105,7 +105,6 @@ typedef struct _parseState {
     char *p;		/*!< current position in expression string */
     int nextToken;	/*!< current lookahead token */
     Value tokenValue;	/*!< valid when TOK_INTEGER or TOK_STRING */
-    rpmSpec spec;	/*!< spec file that we are parsing inside of */
 } *ParseState;
 
 
@@ -644,7 +643,7 @@ static Value doLogical(ParseState state)
   return v1;
 }
 
-int parseExpressionBoolean(rpmSpec spec, const char *expr)
+int parseExpressionBoolean(const char *expr)
 {
   struct _parseState state;
   int result = -1;
@@ -654,7 +653,6 @@ int parseExpressionBoolean(rpmSpec spec, const char *expr)
 
   /* Initialize the expression parser state. */
   state.p = state.str = xstrdup(expr);
-  state.spec = spec;
   state.nextToken = 0;
   state.tokenValue = NULL;
   (void) rdToken(&state);

build/parseSpec.c

@@ -352,7 +352,7 @@ int readLine(rpmSpec spec, int strip)
 	match = !match;
     } else if (ISMACROWITHARG(s, "%if")) {
 	s += 3;
-        match = parseExpressionBoolean(spec, s);
+        match = parseExpressionBoolean(s);
 	if (match < 0) {
 	    rpmlog(RPMLOG_ERR,
 			_("%s:%d: bad %%if condition\n"),

build/rpmbuild_internal.h

@@ -290,12 +290,11 @@ rpmRC parseRCPOT(rpmSpec spec, Package pkg, const char * field, rpmTagVal tagN,
 
 /** \ingroup rpmbuild
  * Evaluate boolean expression.
- * @param spec		spec file control structure
  * @param expr		expression to parse
  * @return
  */
 RPM_GNUC_INTERNAL
-int parseExpressionBoolean(rpmSpec spec, const char * expr);
+int parseExpressionBoolean(const char * expr);
 
 /** \ingroup rpmbuild
  * Run a build script, assembled from spec file scriptlet section.