bug fix, broken insert at the front of CKTbreaks[]

ChangeLog

@@ -1,9 +1,13 @@
+2011-08-04  Robert Larice
+ * src/spicelib/analysis/cktsetbk.c :
+   bug fix, broken insert at the front of CKTbreaks[]
+
 2011-08-03  Holger Vogt
  * ivars.c update for LINUX
  * tclspice.c, nghelp.c, spiced.c: ivars(NULL)
  * main.c: reference to memory leak checker for Windows removed
  * visualc/vngspice.sln, visualc\vngspice.vcproj: 32 and 64 bit
- 
+
 2011-07-30  Dietmar Warning
  * adms/ekv/admsva/ekv.va: semicolon after macro expl was wrong
  * adms/mextram/admsva: update va code from version 504.7 to 504.9.1

src/spicelib/analysis/cktsetbk.c

@@ -44,7 +44,7 @@ CKTsetBreak(CKTcircuit *ckt, double time)
                 *(ckt->CKTbreaks+i) = time;
                 return(OK);
             }
-            if(time-*(ckt->CKTbreaks+i-1) <= ckt->CKTminBreak) {
+            if(i>0 && time-*(ckt->CKTbreaks+i-1) <= ckt->CKTminBreak) {
                 /* very close together, but after, so skip */
 #ifdef TRACE_BREAKPOINT
                 printf("[t:%e] \t %e skipped\n", ckt->CKTtime, time);