[Piglit] [PATCH] gl-1.0-readpixsanity: Fix GCC maybe-uninitialized warnings.

[Vinson Lee]

readpix.c: In function 'check_stencil':
readpix.c:325:3: warning: 'expected' may be used uninitialized in this function [-Wmaybe-uninitialized]
   printf("\t\tExpected %i; got %i.\n",
   ^
readpix.c:326:19: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
    expected, buf[y*w + x]);
                   ^
readpix.c:326:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
    expected, buf[y*w + x]);
                      ^

Signed-off-by: Vinson Lee <vlee at freedesktop.org>
---
 tests/spec/gl-1.0/readpix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/spec/gl-1.0/readpix.c b/tests/spec/gl-1.0/readpix.c
index e43a218..9597706 100644
--- a/tests/spec/gl-1.0/readpix.c
+++ b/tests/spec/gl-1.0/readpix.c
@@ -283,12 +283,12 @@ random_bits(unsigned int bits)
 bool
 check_stencil(void) 
 {
-	int i, x, y;
+	int i, x = 0, y = 0;
 	bool pass = true;
 	const int w = piglit_width;
 	const int h = piglit_height;
 	GLuint *buf = malloc(h * w * sizeof *buf);
-	GLuint expected;
+	GLuint expected = 0;
 	GLint sbits;
 	glGetIntegerv(GL_STENCIL_BITS, &sbits);
 	pass &= piglit_check_gl_error(GL_NO_ERROR);
-- 
2.2.0