[gimp] plug-ins: fix more abs().

[Jehan <jehanp src gnome org>]

commit f6dd30f3a83c9b97557ee3de946777f0f6832d75
Author: Jehan <jehan girinstud io>
Date:   Tue Apr 14 00:10:09 2020 +0200

    plug-ins: fix more abs().
    
    I am comparing absolute value of 2 double computation results. Might as
    well just use fabs() instead of truncating both values to int.
    Fixes the following:
    > warning: using integer absolute value function ‘abs’ when argument is
    > of floating point type ‘double’ [-Wabsolute-value]

 plug-ins/gfig/gfig-grid.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/plug-ins/gfig/gfig-grid.c b/plug-ins/gfig/gfig-grid.c
index 687eb9458c..ac81859e5b 100644
--- a/plug-ins/gfig/gfig-grid.c
+++ b/plug-ins/gfig/gfig-grid.c
@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <math.h>
 #include <stdlib.h>
 
 #include <libgimp/gimp.h>
@@ -309,8 +310,8 @@ find_grid_pos (GdkPoint *p,
       m_hi_n_lo = m_lo_n_lo + 1;
 
      /* figure out which is the better candidate */
-      if (abs ((m_lo_n_lo * r + (0.5 * r * (n_lo % 2))) - y) <
-          abs ((m_hi_n_lo * r + (0.5 * r * (n_lo % 2))) - y))
+      if (fabs ((m_lo_n_lo * r + (0.5 * r * (n_lo % 2))) - y) <
+          fabs ((m_hi_n_lo * r + (0.5 * r * (n_lo % 2))) - y))
         {
           m_n_lo = m_lo_n_lo;
         }
@@ -324,8 +325,8 @@ find_grid_pos (GdkPoint *p,
       m_hi_n_hi = m_lo_n_hi + 1;
 
       /* figure out which is the better candidate */
-      if (abs((m_lo_n_hi * r + (0.5 * r * (n_hi % 2))) - y) <
-          abs((m_hi_n_hi * r + (0.5 * r * (n_hi % 2))) - y))
+      if (fabs((m_lo_n_hi * r + (0.5 * r * (n_hi % 2))) - y) <
+          fabs((m_hi_n_hi * r + (0.5 * r * (n_hi % 2))) - y))
         {
           m_n_hi = m_lo_n_hi;
         }