Use empty initializer lists for zeroing structs.

This works around an incorrect Clang warning:
https://llvm.org/bugs/show_bug.cgi?id=21689

Bug 15387371

Change-Id: I2460a4f6dd414f518789be1fcc8ce8b205c6a066
Reviewed-on: https://swiftshader-review.googlesource.com/4491
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

src/Common/Socket.cpp

diff --git a/src/Common/Socket.cpp b/src/Common/Socket.cpp
index 1a68fbb..a0ac3f4 100644
--- a/src/Common/Socket.cpp
+++ b/src/Common/Socket.cpp
@@ -33,7 +33,7 @@
 			socket = -1;

 		#endif

 

-		addrinfo hints = {0};

+		addrinfo hints = {};

 		hints.ai_family = AF_INET;

 		hints.ai_socktype = SOCK_STREAM;

 		hints.ai_protocol = IPPROTO_TCP;

src/Main/FrameBuffer.cpp

diff --git a/src/Main/FrameBuffer.cpp b/src/Main/FrameBuffer.cpp
index 9afd19f..bb1151f 100644
--- a/src/Main/FrameBuffer.cpp
+++ b/src/Main/FrameBuffer.cpp
@@ -193,8 +193,7 @@
 
 	void FrameBuffer::copyLocked()
 	{
-		BlitState update = {0};
-
+		BlitState update = {};
 		update.width = width;
 		update.height = height;
 		update.destFormat = destFormat;

src/Renderer/Renderer.cpp

diff --git a/src/Renderer/Renderer.cpp b/src/Renderer/Renderer.cpp
index 6ad2be3..49e856e 100644
--- a/src/Renderer/Renderer.cpp
+++ b/src/Renderer/Renderer.cpp
@@ -2522,7 +2522,7 @@
 		{
 			terminateThreads();
 
-			SwiftConfig::Configuration configuration = {0};
+			SwiftConfig::Configuration configuration = {};
 			swiftConfig->getConfiguration(configuration);
 
 			precacheVertex = !newConfiguration && configuration.precache;