pybootchartgui: fix 2 SyntaxWarnings

scripts/pybootchartgui/pybootchartgui/draw.py:820: SyntaxWarning: "is not" with a literal. Did you mean "!="?
  if (OPTIONS.show_pid or OPTIONS.show_all) and ipid is not 0:
scripts/pybootchartgui/pybootchartgui/draw.py:918: SyntaxWarning: "is not" with a literal. Did you mean "!="?
  if i is not 0:

(From OE-Core rev: ebd61290a644a6d9f2b3701e0e7ea050636da76c)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
(cherry picked from commit 8d996616f0ca57220d939a41ca9ba6d696ea2a4f)
Signed-off-by: Jose Quaresma <jose.quaresma@foundries.io>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

scripts/pybootchartgui/pybootchartgui/draw.py

@@ -703,7 +703,7 @@ def draw_processes_recursively(ctx, proc, proc_tree, y, proc_h, rect, clip) :
         cmdString = proc.cmd
     else:
         cmdString = ''
-    if (OPTIONS.show_pid or OPTIONS.show_all) and ipid is not 0:
+    if (OPTIONS.show_pid or OPTIONS.show_all) and ipid != 0:
         cmdString = cmdString + " [" + str(ipid // 1000) + "]"
     if OPTIONS.show_all:
         if proc.args:
@@ -801,7 +801,7 @@ class CumlSample:
         if self.color is None:
             i = self.next() % HSV_MAX_MOD
             h = 0.0
-            if i is not 0:
+            if i != 0:
                 h = (1.0 * i) / HSV_MAX_MOD
             s = 0.5
             v = 1.0