minor doxygen fixes

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62663 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/pngdriver/box.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Box.c
+  \file lib/pngdriver/box.c
 
   \brief GRASS png display driver - draw box
 

lib/pngdriver/color.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Color.c
+  \file lib/pngdriver/color.c
 
   \brief GRASS png display driver - PNG_color_rgb
 

lib/pngdriver/draw.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Draw.c
+  \file lib/pngdriver/draw.c
 
   \brief GRASS PNG display driver
 

lib/pngdriver/draw_bitmap.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Draw_bitmap.c
+  \file lib/pngdriver/draw_bitmap.c
 
   \brief GRASS png display driver - draw bitmap
 

lib/pngdriver/driver.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Driver.c
+  \file lib/pngdriver/driver.c
 
   \brief GRASS png display driver - driver initialization
 

lib/pngdriver/erase.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Erase.c
+  \file lib/pngdriver/erase.c
 
   \brief GRASS png display driver - erase screen
 

lib/pngdriver/graph_close.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Graph_close.c
+  \file lib/pngdriver/graph_close.c
 
   \brief GRASS png display driver - close graphics processing
 

lib/pngdriver/graph_set.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Graph_set.c
+  \file lib/pngdriver/graph_set.c
 
   \brief GRASS png display driver - set graphics processing
 

lib/pngdriver/line_width.c

@@ -1,5 +1,5 @@
 /*!
-  \file lib/pngdriver/Line_width.c
+  \file lib/pngdriver/line_width.c
 
   \brief GRASS png display driver - set line width
 

lib/psdriver/draw.c

@@ -1,5 +1,5 @@
 /*!
-  \file psdriver/Draw.c
+  \file lib/psdriver/draw.c
 
   \brief GRASS PS display driver