fixed crash with zero height for drawBox(), issue #236

csrc/u8g2_box.c

@@ -45,12 +45,12 @@ void u8g2_DrawBox(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t w, u8g
   if ( u8g2_IsIntersection(u8g2, x, y, x+w, y+h) == 0 ) 
     return;
 #endif /* U8G2_WITH_INTERSECTION */
-  do
+  while( h != 0 )
   { 
     u8g2_DrawHVLine(u8g2, x, y, w, 0);
     y++;    
     h--;
-  } while( h != 0 );
+  }
 }
 
 

sys/arm/stm32l031x6/u8g2_rtc/Makefile

@@ -34,7 +34,7 @@ GCCBINPATH:=/usr/bin/
 # Project Information
 
 # The name for the project
-TARGETNAME:=u8x8_test
+TARGETNAME:=u8g2_rtc
 
 # The source files of the project
 CSRC:=$(wildcard *.c)