mesa: Move declarations before code.

mesa: Move declarations before code.

This patch fixes these MSVC build errors introduced with
73b78f9c9f86dd38fb165f4730aeac9519635b07.

  Compiling src\mesa\main\uniforms.c ...
uniforms.c
src\mesa\main\uniforms.c(291) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(294) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(294) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(294) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(306) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(309) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(309) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(309) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(322) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(325) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(325) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(325) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(345) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(348) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(348) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(348) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(360) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(363) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(363) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(363) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(376) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(379) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(379) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(379) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(588) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(591) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(591) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(591) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(603) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(606) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(606) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(606) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2
src\mesa\main\uniforms.c(619) : error C2143: syntax error : missing ';' before 'type'
src\mesa\main\uniforms.c(622) : error C2065: 'shProg' : undeclared identifier
src\mesa\main\uniforms.c(622) : warning C4047: 'function' : 'gl_shader_program *' differs in levels of indirection from 'int'
src\mesa\main\uniforms.c(622) : warning C4024: '_mesa_uniform' : different types for formal and actual parameter 2

Signed-off-by: Vinson Lee <vlee@freedesktop.org>