bug fix in off reader

Former-commit-id: 17898e8b043d7780e7dac6eaf798a0911dafe9bc

examples/quicklook-mesh/src/render_to_buffer.cpp

@@ -372,6 +372,7 @@ bool render_to_buffer(
     // Convert extension to lower case
     if(!igl::readOBJ(filename,vV,vTC,vN,vF,vFTC,vFN))
     {
+      cerr<<"readOBJ failed."<<endl;
       red(width,height,buffer);
       return false;
     }
@@ -380,6 +381,7 @@ bool render_to_buffer(
     // Convert extension to lower case
     if(!igl::readOFF(filename,vV,vF,vN))
     {
+      cerr<<"readOFF failed."<<endl;
       red(width,height,buffer);
       return false;
     }
@@ -425,6 +427,7 @@ bool render_to_buffer(
   {
     if(!list_to_matrix(vV,V))
     {
+      cerr<<"list_to_matrix failed."<<endl;
       red(width,height,buffer);
       return false;
     }

include/igl/readOFF.cpp

@@ -32,7 +32,7 @@ IGL_INLINE bool igl::readOFF(
   const std::string NOFF("NOFF");
   if(fscanf(off_file,"%s\n",header)!=1
      || !(
-       string(header).compare(0,NOFF.length(),NOFF)==0 || 
+       string(header).compare(0, OFF.length(), OFF)==0 || 
        string(header).compare(0,NOFF.length(),NOFF)==0))
   {
     printf("Error: %s's first line should be OFF or NOFF not %s...",off_file_name.c_str(),header);