Fix random hour of time shift.

What appeared to be a random daylight savings time issue, was a failure to zero out a struct tm.  Appears to be fixed.

Author: topher800

dataIO.c

@@ -897,9 +897,8 @@ void GetTimeInterval(int InputFile, DATAFILE_INFO *curFile, int timeVarID, size_
     if (getNCattr(InputFile, timeVarID, "strptime_format", format) == false)
       format = "seconds since %F %T %z";
 
+    memset(&stm, 0, sizeof(struct tm));
     strptime(units.c_str(), format.c_str(), &stm);
-    setenv("TZ", "", 1);
-    tzset();
     time_t start = mktime(&stm) + first - timezone;
     time_t end = mktime(&stm) + last - timezone;
 

fbr.h

@@ -54,7 +54,7 @@ static String fallback_resources[] =
   "*XmTextField.foreground:		black",
   "*XmForm.horizontalSpacing:		4",
   "*XmForm.verticalSpacing:		4",
-  "*topLevelShell.title:		ncplot 4.11.4",
+  "*topLevelShell.title:		ncplot 4.12.0",
   "*topLevelShell.iconName:		ncplot",
   "*topLevelShell.allowShellResize:	True",
   "*topLevelShell.x:			50",