r600/llvm: initialize radeon_llvm_binary

use memset to initialize to 0's... otherwise code_size and config_size
could be uninitialized when read later in this method.

It's also hard to do NULL checks on uninitialized pointers.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

v2: Fix indentation

CC: "10.0" <mesa-stable@lists.freedesktop.org>

src/gallium/drivers/r600/r600_llvm.c

@@ -831,6 +831,7 @@ unsigned r600_llvm_compile(
 	const char * gpu_family = r600_llvm_gpu_string(family);
 	unsigned i;
 
+	memset(&binary, 0, sizeof(struct radeon_llvm_binary));
 	r = radeon_llvm_compile(mod, &binary, gpu_family, dump);
 
 	assert(binary.code_size % 4 == 0);