Minor preprocessor fix for error message line/string numbers coming from source line, not macro line.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23576 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/cppComplexExpr.vert

@@ -38,3 +38,11 @@ void main()
 // sum should be 321.0
     gl_Position = vec4(sum);
 }
+
+#define ADD(a, b) a + b + ((a) + ((b)));
+
+float foo()
+{
+    return ADD(gl_Position.xyxwx, 3.0)  // ERROR, should be this line number
+    return ADD(gl_Position.y, 3.0)
+}