Fix warnings

Change-Id: I1ba5c871a1cb44df8c383f595cbe6d75fef02aa3
diff --git a/tests/hwc/test-arrows.c b/tests/hwc/test-arrows.c
index a35faa7..12e7c8f 100644
--- a/tests/hwc/test-arrows.c
+++ b/tests/hwc/test-arrows.c
@@ -140,7 +140,7 @@
 int main(int argc, char **argv) {
 	EGLDisplay display;
 	EGLSurface surface;
-	int w, h, count;
+	int w, h, count = 0;
 
 	if (argc > 1)
 		count = atoi(argv[1]);