Fix potentially uninitialized variables.

Bug 15387371

Change-Id: Ie0486feeebc6e4bceba148bea69f2d1ee1d1ffd8
Reviewed-on: https://swiftshader-review.googlesource.com/4499
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
diff --git a/src/Shader/Shader.cpp b/src/Shader/Shader.cpp
index 6251359..82a038d 100644
--- a/src/Shader/Shader.cpp
+++ b/src/Shader/Shader.cpp
@@ -1111,7 +1111,7 @@
 		majorVersion = (unsigned char)((token[0] & 0x0000FF00) >> 8);
 		shaderType = (ShaderType)((token[0] & 0xFFFF0000) >> 16);
 
-		int length;
+		int length = 0;
 
 		if(shaderType == SHADER_VERTEX)
 		{