Allow "--ignoresize" for erase operations.

Index: lib/rpminstall.c
===================================================================
--- lib/rpminstall.c.orig
+++ lib/rpminstall.c
@@ -850,7 +850,7 @@ int rpmErase(rpmts ts, struct rpmInstall
 	/* Drop added/available package indices and dependency sets. */
 	rpmtsClean(ts);
 
-	numPackages = rpmtsRun(ts, NULL, 0);
+	numPackages = rpmtsRun(ts, NULL, ia->probFilter & (RPMPROB_FILTER_DISKSPACE|RPMPROB_FILTER_DISKNODES));
 	ps = rpmtsProblems(ts);
 	if (rpmpsNumProblems(ps) > 0)
 	    rpmpsPrint(NULL, ps);
Index: rpmqv.c
===================================================================
--- rpmqv.c.orig
+++ rpmqv.c
@@ -468,7 +468,7 @@ int main(int argc, const char ** argv)
 	argerror(_("--ignoreos may only be specified during package "
 		   "installation"));
 
-    if (bigMode != MODE_INSTALL &&
+    if (bigMode != MODE_INSTALL && bigMode != MODE_ERASE &&
 	(ia->probFilter & (RPMPROB_FILTER_DISKSPACE|RPMPROB_FILTER_DISKNODES)))
 	argerror(_("--ignoresize may only be specified during package "
 		   "installation"));