Resolve some of clang's double-promotion warnings

src/hb-aat-layout-trak-table.hh

@@ -104,7 +104,7 @@ struct TrackData
     const TrackTableEntry *trackTableEntry = nullptr;
     for (unsigned int i = 0; i < sizes; ++i)
       // For now we only seek for track entries with zero tracking value
-      if (trackTable[i].get_track_value () == 0.)
+      if (trackTable[i].get_track_value () == 0.f)
         trackTableEntry = &trackTable[0];
 
     // We couldn't match any, exit
@@ -127,8 +127,8 @@ struct TrackData
     float s0 = size_table[size_index - 1].to_float ();
     float s1 = size_table[size_index].to_float ();
     float t = (csspx - s0) / (s1 - s0);
-    return t * trackTableEntry->get_value (base, size_index) +
-      (1.0 - t) * trackTableEntry->get_value (base, size_index - 1);
+    return (float) t * trackTableEntry->get_value (base, size_index) +
+	   ((float) 1.0 - t) * trackTableEntry->get_value (base, size_index - 1);
   }
 
   protected:

src/hb-open-type-private.hh

@@ -684,8 +684,8 @@ typedef HBUINT16 UFWORD;
 struct F2DOT14 : HBINT16
 {
   // 16384 means 1<<14
-  inline float to_float (void) const { return ((int32_t) v) / 16384.0; }
-  inline void set_float (float f) { v.set (round (f * 16384.0)); }
+  inline float to_float (void) const { return ((int32_t) v) / 16384.f; }
+  inline void set_float (float f) { v.set (round (f * 16384.f)); }
   public:
   DEFINE_SIZE_STATIC (2);
 };
@@ -694,8 +694,8 @@ struct F2DOT14 : HBINT16
 struct Fixed : HBINT32
 {
   // 65536 means 1<<16
-  inline float to_float (void) const { return ((int32_t) v) / 65536.0; }
-  inline void set_float (float f) { v.set (round (f * 65536.0)); }
+  inline float to_float (void) const { return ((int32_t) v) / 65536.f; }
+  inline void set_float (float f) { v.set (round (f * 65536.f)); }
   public:
   DEFINE_SIZE_STATIC (4);
 };

src/hb-ot-layout-common-private.hh

@@ -1280,7 +1280,7 @@ struct VarRegionList
     {
       int coord = i < coord_len ? coords[i] : 0;
       float factor = axes[i].evaluate (coord);
-      if (factor == 0.)
+      if (factor == 0.f)
         return 0.;
       v *= factor;
     }