Fix cameraEffects compile error

Author: VReaperV

src/engine/renderer/glsl_source/cameraEffects_fp.glsl

@@ -42,15 +42,15 @@ uniform bool u_Tonemap;
 uniform vec4 u_TonemapParms;
 uniform float u_TonemapExposure;
 
-DECLARE_OUTPUT(vec4)
-
 vec3 TonemapLottes( vec3 color ) {
   // Lottes 2016, "Advanced Techniques and Optimization of HDR Color Pipelines"
   return pow( color, vec3( u_TonemapParms[0] ) )
          / ( pow( color, vec3( u_TonemapParms[0] * u_TonemapParms[1] ) ) * u_TonemapParms[2] + u_TonemapParms[3] );
 }
 #endif
 
+DECLARE_OUTPUT(vec4)
+
 void main()
 {
 	// calculate the screen texcoord in the 0.0 to 1.0 range