backport workaround for OpenBSD compiler bug

contrib/seg/segparse.y

@@ -18,10 +18,9 @@
   void seg_yyerror(const char *message);
   int seg_yyparse( void *result );
 
-  float seg_atof( char *value );
+  static float seg_atof(char *value);
 
-  long threshold;
-  char strbuf[25] = {
+  static char strbuf[25] = {
     '0', '0', '0', '0', '0',
     '0', '0', '0', '0', '0',
     '0', '0', '0', '0', '0',
@@ -108,30 +107,39 @@ range:
 
 boundary:
           SEGFLOAT {
+			/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
+			float val = seg_atof($1);
+
              $$.ext = '\0';
 	     $$.sigd = significant_digits($1);
-             $$.val = seg_atof($1);
+			$$.val = val;
 	  }
       | 
 	  EXTENSION SEGFLOAT {
+			/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
+			float val = seg_atof($2);
+
              $$.ext = $1[0];
 	     $$.sigd = significant_digits($2);
-             $$.val = seg_atof($2);
+			$$.val = val;
 	  }
       ;
 
 deviation:
           SEGFLOAT {
+			/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
+			float val = seg_atof($1);
+
              $$.ext = '\0';
 	     $$.sigd = significant_digits($1);
-             $$.val = seg_atof($1);
+			$$.val = val;
 	  }
       ;
 
 %%
 
 
-float
+static float
 seg_atof(char *value)
 {
 	Datum datum;