tavoid unused variable warning - slidergrid - grid of elastic sliders on a frictional surface
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       ---
 (DIR) commit 98510995b3b02e74f91395782889154b236d517a
 (DIR) parent 75d805810911e239896f6865ab9af0dc10b2f2ed
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Tue, 22 Mar 2016 11:30:17 -0700
       
       avoid unused variable warning
       
       Diffstat:
         M slidergrid/debug.h                  |       2 +-
         M slidergrid/main.c                   |       3 ++-
       
       2 files changed, 3 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/slidergrid/debug.h b/slidergrid/debug.h
       t@@ -3,7 +3,7 @@
        
        // if defined, verbose information to stdout will be shown during the 
        // slider-bond initialization function
       -//#define DEBUG_FIND_AND_BOND_TO_NEIGHBORS
       +#define DEBUG_FIND_AND_BOND_TO_NEIGHBORS
        
        // if defined, verbose information to stdout will be shown before the slider 
        // integration
 (DIR) diff --git a/slidergrid/main.c b/slidergrid/main.c
       t@@ -41,7 +41,7 @@ void print_status(simulation sim)
        
        int main(int argc, char** argv)
        {
       -    int i, j;
       +    int i;
        
            // default values of command-line flags
            int verbose = 0;
       t@@ -138,6 +138,7 @@ int main(int argc, char** argv)
                            sim.iteration);
        
        #ifdef DEBUG_SLIDER_FORCE_TORQUE_AND_NEIGHBORS
       +            int j;
                    printf("Slider %d: F = %f %f %f, T = %f %f %f, neighbors = ",
                            i,
                            sim.sliders[i].force.x,