Fixed return type

common/RendererInfo.cc

@@ -146,7 +146,7 @@ RendererInfo* RenderManager::operator[](unsigned int _id) {
 
 }
 
-unsigned int RenderManager::available() {
+size_t RenderManager::available() {
   return availableRenderers_.size();
 }
 
@@ -280,7 +280,7 @@ PostProcessorInfo* PostProcessorManager::operator[](unsigned int _id ) {
 
 }
 
-unsigned int PostProcessorManager::available() {
+size_t PostProcessorManager::available() {
   return availablePostProcessors_.size();
 }
 

common/RendererInfo.hh

@@ -144,7 +144,7 @@ class DLLEXPORT RenderManager {
      *
      * @return number of available renderers
      */
-    unsigned int available();
+    size_t available();
 
     /** \brief set the active renderer
      *
@@ -255,7 +255,7 @@ class DLLEXPORT PostProcessorManager {
     *
     * @return number of available post processor
     */
-    unsigned int available();
+    size_t available();
 
     /** \brief set the active post processor for viewer
     *