Address some compiler warnings about implicit integer conversions.

--HG--
branch : minor

src/modules/graphics/opengl/Canvas.cpp

@@ -629,7 +629,7 @@ love::image::ImageData *Canvas::newImageData(love::image::Image *image, int x, i
 		break;
 	}
 
-	int size = w * h * image::ImageData::getPixelSize(imageformat);
+	size_t size = w * h * image::ImageData::getPixelSize(imageformat);
 	uint8 *pixels = nullptr;
 	try
 	{

src/modules/graphics/opengl/Graphics.cpp

@@ -1299,7 +1299,7 @@ void Graphics::points(const float *coords, const uint8 *colors, size_t numpoints
 	}
 
 	gl.useVertexAttribArrays(attribflags);
-	gl.drawArrays(GL_POINTS, 0, numpoints);
+	gl.drawArrays(GL_POINTS, 0, (GLsizei) numpoints);
 }
 
 void Graphics::polyline(const float *coords, size_t count)

src/modules/graphics/opengl/Mesh.cpp

@@ -569,7 +569,7 @@ int Mesh::bindAttributeToShaderInput(int attributeindex, const std::string &inpu
 	GLenum datatype = getGLDataType(format.type);
 	GLboolean normalized = (datatype == GL_UNSIGNED_BYTE);
 
-	glVertexAttribPointer(attriblocation, format.components, datatype, normalized, vertexStride, gloffset);
+	glVertexAttribPointer(attriblocation, format.components, datatype, normalized, (GLsizei) vertexStride, gloffset);
 
 	return attriblocation;
 }

src/modules/graphics/opengl/Shader.cpp

@@ -420,7 +420,7 @@ void Shader::attach(bool temporary)
 		{
 			// make sure all sent textures are properly bound to their respective texture units
 			// note: list potentially contains texture ids of deleted/invalid textures!
-			for (size_t i = 0; i < activeTexUnits.size(); ++i)
+			for (int i = 0; i < (int) activeTexUnits.size(); ++i)
 			{
 				if (activeTexUnits[i] > 0)
 					gl.bindTextureToUnit(activeTexUnits[i], i + 1, false);

src/modules/graphics/opengl/wrap_Mesh.cpp

@@ -131,7 +131,7 @@ int w_Mesh_setVertices(lua_State *L)
 	}
 
 	luaL_checktype(L, 2, LUA_TTABLE);
-	size_t nvertices = luax_objlen(L, 2);
+	int nvertices = (int) luax_objlen(L, 2);
 
 	if (vertoffset + nvertices > t->getVertexCount())
 		return luaL_error(L, "Too many vertices (expected at most %d, got %d)", (int) t->getVertexCount() - (int) vertoffset, (int) nvertices);
@@ -144,7 +144,7 @@ int w_Mesh_setVertices(lua_State *L)
 
 	char *data = (char *) t->mapVertexData() + byteoffset;
 
-	for (size_t i = 0; i < nvertices; i++)
+	for (int i = 0; i < nvertices; i++)
 	{
 		// get vertices[vertindex]
 		lua_rawgeti(L, 2, i + 1);

src/modules/graphics/opengl/wrap_Text.cpp

@@ -39,7 +39,7 @@ void luax_checkcoloredstring(lua_State *L, int idx, std::vector<Font::ColoredStr
 
 	if (lua_istable(L, idx))
 	{
-		int len = luax_objlen(L, idx);
+		int len = (int) luax_objlen(L, idx);
 
 		for (int i = 1; i <= len; i++)
 		{