Revert "HUGE->HUGE_VAL"

This reverts commit 01accbf78c0223967942b15202922d7d8a703604.

dev/grain/grain1.c

@@ -3188,7 +3188,7 @@ int grev(dataptr dz)
         maxsamp0 = 0.0;
         maxsamp1 = 0.0;
         gotmaxsamp0 = 0;
-        minpeakav = HUGE_VAL;
+        minpeakav = HUGE;
         minpeakloc = -1;
         j = startsearch;
         crossed_zero_to_positive = 0;