[PATCH] Fix "possibly uninitialized" warnings in glx.

[Jamey Sharp]

In both functions, "answer" was uninitialized if "compsize" was 0, but in
that case __GLX_SEND_VOID_ARRAY(compsize) results in a call to
WriteToClient for 0 bytes, which returns immediately without examining the
"answer" argument. So initializing to a null pointer is as good as
anything else.

Signed-off-by: Jamey Sharp <jamey at minilop.net>
---
 glx/indirect_texture_compression.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/glx/indirect_texture_compression.c b/glx/indirect_texture_compression.c
index 25c6eb3..aca4b3e 100644
--- a/glx/indirect_texture_compression.c
+++ b/glx/indirect_texture_compression.c
@@ -52,7 +52,7 @@ int __glXDisp_GetCompressedTexImageARB(struct __GLXclientStateRec *cl, GLbyte *p
 	const GLenum target = *(GLenum *)(pc + 0);
 	const GLint  level  = *(GLint  *)(pc + 4);
 	GLint compsize = 0;
-	char *answer, answerBuffer[200];
+	char *answer = 0, answerBuffer[200];
 
 	CALL_GetTexLevelParameteriv(GET_DISPATCH(), (target, level, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &compsize));
 
@@ -92,7 +92,7 @@ int __glXDispSwap_GetCompressedTexImageARB(struct __GLXclientStateRec *cl, GLbyt
 	const GLenum target = (GLenum) bswap_32( *(int *)(pc + 0) );
 	const GLint  level =  (GLint ) bswap_32( *(int *)(pc + 4) );
 	GLint compsize = 0;
-	char *answer, answerBuffer[200];
+	char *answer = 0, answerBuffer[200];
 
 	CALL_GetTexLevelParameteriv(GET_DISPATCH(), (target, level, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &compsize));
 
-- 
1.6.3.3